Have you had success with Amazon Mturk?

I love Mturk, but haven't made THAT much...not yet at least. So far I've made $157 on Mturk and I've been doing this since July. At first I wasn't making much, but like you said it takes trial and error. I'm still learning and finding new HITs every day. I like the survey HITs... the ones for $.50 and up.

I've been on Mturk since late April. I've earned around 30 dollars so far. I went quite some time without participating though. I try to do a couple of HITS daily now though. My favorite HITS are usually the surveys. Many of them are way shorter than other survey sites, and you get paid decently most of the time. It's very encouraging seeing how much you have earned. Kinda motivates me to be more active on there. Keep up the great work.