I would stick to micro-niches.....
I would start with CCBill sites since it's easier to make payout......I believe it's $25, so it's fairly easy to get the money rolling when you are a newbie and you need funds to grow your empire...
.....stay away from joining blog directories.....you will get good traffic at first, but in the end you will be giving away good hardlinks to those directories for insignificant links or traffic.....stick to trading links with respectable webmasters
Good Luck!
