You’ve got to like what you are doing to be happy and successful.
Explore a niche that really interests you.
Before you get a domain name or start promoting, check out SEOmoz’s free online “Beginner’s Guide To SEO”. Then start learning & exploring more on SEO at google keywords tool and everyplace else you can find. But don’t ‘fall for’ anyone’s get rich quick ‘pitch’.
If you are from the USA, you’ll also rest easier if you promote to the NON-USA market.
Cheers ):