If you don't have a budget for an SEO consultant, then you need to do his job for him....
So learn a little bit about SEO and apply little tips, one at a time. One of the most basic things that you can do, is tell people about it

I know it sounds simple and almost silly, but it works. So go to facebook, get an account, get friends, and talk about your Guinea pigs - there are right and wrong ways to market on facebook, but some Googling should give you pointers in that direction.
SEO takes time - the more time you put into it, the better it works. Find a new SEO concept to try each day, apply it, and you'll be 10 steps closer to world domination
Hope that helps give some perspective.
Matt
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