Tips for the RMAH?

Hey all, you'll have to excuse me if theres already been a link for this subject (and if so, if someone could link it that'd be great. Sorry im not too redditsavy!) But I was wondering what success people have had with the Real Money Auction House?

I'm not looking to pay my rent or buy a new computer by any means, but it'd be nice to get a little more cash on the side, and I was wondering what I should be looking for? What sells? What doesn't sell? How much money have YOU made on the auction house? Any tips to hell out fellow Diablo 3 fans, would be awesome.