To get free or "natural" traffic to your website, you need to generate buzz about your site and the products that you sell.
You should set up facebook and twitter accounts for your business and regularly post on them. Get as many people as possible to follow your twitter account and become fans of your facebook account.

You absolutely have to blog about your business, preferably on several blogs. With blogging you are not restrained with content and character limits. You could go as deeply as you wish describing your products, comparing them to competition, posting customer testimonials and so on. Blogging is free if you use services like http://www.blogger.com or http://www,livejournal.com or it’s nearly free if you setup your own blog server or if you use a commercial service for blog marketing such as http://www.v6transition.com

The key is to write original content as you conduct your marketing. If you have the time and aptitude for writing, you should write yourself because who else can do a better job writing about your business.
If the time is scarce or writing is not your forte, you can always get some college students to write for you for cheap.
References :
http://www.blogger.com
http://www.livejournal.com
http://www.v6transition.com
http://www.facebook.com
http://www.twitter.com

If you are willing to pay a little bit to have heavy traffic, then "Marketing on the Fringe" is the way to go. Not only will this program give you the traffic you want, it will give you traffic you would have never imagined off. By going to this site,
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Whether your on a tight budget or not, spending the money to get this program and learn it will make you more money than any free web trafficing site out there!

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good luck with your new website!
References :
http://ab61b63wg8jj1mzcq8yeoeox24.hop.clickbank.net/

For Free Traffic:

1. Open an ezinearticles.com account (it is free). Write and publish articles about your market on a regular basis. Ezinearticles com gets a lot of traffic and the article pages rank good in the search engines. Be sure to put a link to you site in the author resource box but not in the article itself.

2. Bookmark/list/link-to your site at as many of the popular places you can find: Digg, StimpleUpon, delicious.com, diigo.com, facebook, twitter, etc

3. Submit your site to 50 - 100 free directories. You probably don’t want to do this yourself as it takes a long time. Use a service that does it manually. I like Directory Maximizer. For about $7 bucks they will do 50 or so. The Yahoo Directory is good and carries a lot of weight in the search engines but it may be too expensive to start with.

4. Participate in forums with a link to your site in your forum signature.

5. Make good comments on blogs about your market where you can enter your website.

6. If your site has a page that answers a specific question here at yahoo answers, answer the question with your site as the source.

Be sure to participate with good relevant information and not spam.
All of this will add up to search engine rankings and traffic.

Good Luck
References :

I use http://www.cmkmarketing.com for all my website traffic - They currently have offers for website traffic & email campaigns. I started using them around 2 months ago after trying 3 other compaines. I have seen about a 30% boost in profits, so way worth the money spent with them.

I found them here after everyone had something great to say about them: http://mybiggestcomplaint.com/buying-website-traffic-quality-traffic-supply-scam/1368/
References :
http://www.cmkmarketing.com