It really depends on your product. What is your target market? There
are many ways to market your product without spending a lot of money,
but you need to make sure you have an understanding of the market,
competition and your overall marketing objectives.

A great way to start is to generate some press releases and make sure
you have a solid marketing plan in writing that will allow you to stay
focused. There are a bunch of great PR websites out there that allow
you to post your press releases free of charge. This would be a good
start. Let me know what your product is and perhaps I could provide
some additional advice.

Chad
http://www.bplans.com