Picking Niches/Keywords?

Hi Warriors,

I need some help giving me a little push over the line.

I've been learning about the IM game for about 9 months now and I've been through the process of trial and error with several aspects of IM. I've made some sites, optimised them for SEO, purchased some backlinks, used MS to check for competition. I made 3 sites and targeted some keywords which didn't really have a high search volume but ok competition. I ranked them on page 1 of SERPS which i was pretty happy about, but the problem is they are not really buyer intent keywords. I don't mind that i did it, it was more about the learning process then making money.

Now i'm sitting here with my knowledge of getting things to rank ok, optimising the pages and giving enough decent content to the user to make sure they don't bounce.

Here's where you can help me!

Now it's time to take my learnings and try to make some money. I want to use adsense and i want to make sites with decent information that gives the user something back, not just tries to get them to click on the ads. But i'm having trouble deciding which niches/keywords to target? Obviously i want to have a decent CPC value because i want to invest some time and money in to the project.

Does anyone have any methods the use in this research? Do you go with niches you are familiar with and knowledge already? Do you just use MS to find high searched, low comp niches/keywords and then research the information and make it available to the searchers?

Any help would be great, any recommendations on eBooks or whatever else.

Thanks Warriors!