It takes time - but most important - is having a very user friendly and spider friendly website. Those go hand in hand. You also have to do research - what are the terms people are using to find your type of site/products? If you aren't using those same terms as your main keywords, you'll never get traffic (unless you want to go the PPC route, of course.)

Then, you can do lots of other things - first, do relevant link trading - not to link or banner farms - but to relevant websites - with good anchor text. Write a press release when there is something newsworthy to report about your site. It needs to be professional and really does need to be newsworthy for it to do you any good. Get on some forums related with what you sell - start a blog - write on other related blogs. The list goes on and on. Get yourself business cards and leave them when you travel anywhere that might bring you business. Basically - you need to market. But the whole thing is moot if your site isn't ready for the traffic - and that means professionally done, no typos, easy to navigate, etc.

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Beth
A Child's Palace - Pinata Palace - Moxie Enterprises

SEO and Marketing Tools
SEO - The Basics