I haven't used it in a while, but +1 on the advice to check out the scripts and forums (and reddit, I dunno if that counts as a forum). This will boost your earnings a lot and you'll have less problems. The forums will tell you what scripts and tools to use, and they'll share great HITs. The scripts will give you info on things like how well a particular 'employer' pays, how fast they pay, if they are a scammer who never pays, if they are brand new with no track record, etc. There's a really wide range of payment levels there, anywhere from fairly decent $5-$10/hr kind of stuff to <$1/hour which is really not worth it. When you start out you want to do a ton of very fast and easy HITs, because you'll get access to better-paying ones once you hit certain milestones (e.g. 100 tasks completed, 1000 tasks completed, etc.).