Some of the suggestions here are amazing to me but remind me how difficult SEO is still for some people.

A search engine sends spiders based on inclusion requests and based on links from a site pointing to your site.

If you have a 404 page on your site then the bot will try again later. No matter what it is way to easy to put a single coming soon page on your domain not to do it.

Forget SEO a second. Why would you want to ever have a 404. Create a quick coming soon page and put it up if only for the visitors who might visit your site.

For SEO you are not going to hurt your SEO only having a single coming soon page. In fact you should make it a few pages. Have a coming soon page with a footer that includes an organization page, a contact us section, and an about us page.

Make sure you follow the basic SEO factors and have a good TITLE and H1 tags. Include your meta and put a good paragraph or two on the page that uses some keywords and sets up the product or service you will be bringing when the site is launched.

Short answer.. 404 is never good so build a coming soon.
References :
Brent Csutoras
http://www.brentcsutoras.com

You'll also want to start building links to your site so the search engines can find it more easily. For a new website you'll find it takes 3-6 months (in most cases) for it to start showing up in all of the major search engines so you might as well start now and give the spiders something to look at.

Good luck!

Hunter
References :
http://www.WebstoreSolutions.com

Set up a keyword-rich "coming soon" page and provide a form so visitors can leave their email addresses. When the site rolls out, shoot them all an email to let them know. Even better, give them some premium access, a sneak peek or some other promotional offer. No reason you can't start generating interest now.
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They are owned by Google so you can create a blog for free and, as part of the blog design, you can build in adsense ads. Simplest way to get set up with a free website that will host Google ads.

Good luck!
References :

the only use of ddr is the type of RAM or dance dance revolution video game.
References :

You will end up spending money at some point, but with Adsense you will need major web traffic to earn a decent amount of money and this amount of traffic probably needs a dedicated server etc…

If you have a good web content idea, let me know I might be interested in building the site, hosting it and sharing the Adsense revenue with you.
References :

Hope this helps
References :
http://www.freeinternetmarketingmentoring.com

http://www.johnlambertconsulting.com

Jon Randall
References :

All the contact details are on the website, prices are determined on each project. I know you will love what we can do for you.

MKTG Marketing: http://www.mktg.com.au
References :

If you want to go down the paid direction I would have a read of a Definitive guide to Adwords by Perry Marshall it has revolutionized PPC Advertising and I thoroughly recommend reading it before starting a Google Adwords Campaign

The other route is through SEO, Seo unlike Adwords is a skill to collect traffic and the company I hear recommended a lot even though I never used them is SEOmoz. It would be worthwhile to go around a couple companies and ask what there costs and guarantees.

Best of Luck
References :
http://www.sevendaysuccess.com

Craigslist is another great way to get fast traffic! Post your ad in the proper category once or twice a day and if you have something people want, it will bring you an extra amount of traffic.

To answer your last question, it appears they would assume no one would attempt to verify submission to 50,000 sites. Craigslist, oodle, backpage, and popular blog posting sites can really bring in some steady visitors to your site. Focusing on finding a way to convey your message on as many of the top 20 / highest traffic sites will ease the strain of tracking submission to thousands of unknown sites.

Be sure to implement some way to track your ads and their efficacy. Your hosting site stats should provide some data on where people are coming from. Keep an eye out for the highest clicked through links from your classified postings. The ones that are getting the most traffic steadily are ads that are working for you. The ad copy within these specific ads are showing you a formula that works again and again. Increase the number of places you post to and also focus on other countries. The world is a huge place and you have many more markets to share your products / services / information with.

Seo-formula.com should give you the info to get in the search engines and your own efforts, time, and ingenuity will help get you traffic from free classified sites / high traffic communities.

Good luck!
References :
Seo-formula.com /
Experience

A company that says that they will "put you in 50,000 places" or "guarantee a top-10 position" is almost certainly a scam. The "50,000 places" goal is NOT SEO at all, it's spamming. The "guarantee" is usually worthless if you parse it out. In some cases, the "SEO" firm simply uses PPC bidding and thus as soon as the contract ends, your traffic ends, too.

Unfortunately, SEO requires a lot of planning and work, and takes many months to "pay off."

Using Google AdWords is also more complex than most folks understand. It's certainly a little bit easier to launch and manage, but the cost of PPC advertising is also impacted by your SEO work.

Good luck.
References :

HOW DOES IT WORK

You apply and once you get approved, you can put in the Adsense code in your site. Here are the instructions on how to add Adsense codes on your site https://www.google.com/adsense/support/bin/answer.py?answer=10192&topic=8434

You earn through various ways:

1. Pay per click - this is the common way to earn which is you earn every time a visitor clicks on your ads
2. Pay per impression - an advertiser can specifically target your site and show ads where you earn via cost per 1,000 impression (e.g. you earn every time someone sees your ad, even though they don't click on it)

WHAT PERSONAL INFO DO I HAVE TO GIVE?

In the application form https://www.google.com/adsense/g-app-single-1 you will give

- your name
- your address
- if your country qualifies for electronic fund transfer and you wish to be paid by EFT, your bank details
- your SSN or tax account number if you are in the US as Google reports Adsense income to the IRS

IS IT WORTH IT AND HOW MUCH MONEY PER MONTH DOES IT BRING IN?

Some sites do very well with Adsense (even in the millions of dollars a year) while many more sites do extremely poorly with the program (can't even earn $10 a month). One of the misconception people have about Adsense is they simply slap it in their websites and it will automatically earn them big money — which is not true as evidenced by the many disgruntled webmasters

Your income will depend on:

- the topic of your site (if you have high paying keywords you stand to earn more)
- responsiveness of users to ad (are visitors coming to your site with blinders in their eye or do they look at the ads as additional complementary resource)
- traffic (you earn more with more traffic, even if you have low paying keywords or other metrics)
- how you implement the ads on your site (some positions and colors work better than others)

I suggest you join the program (you've got nothing to lose as it is free) and see how your site will do with it.
References :

They may be able to advise you

Good luck
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then have a gmail account

then make account in google adsense

u r done

but you must be having your own website with own domain
References :

ePress Releases are cheap and free
Blogs are cleap and free
Youtube methods, etc etc

References :
http://automotiveseoblog.com/