What are the best ways to get traffic to a website?

[Rus]

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.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.