I've written 9 articles for textbroker clients so far and I am really enjoying the challenge. I am eagerly awaiting having the articles rated by textbroker. They have different levels of ratings for their writers, and the higher your rating the better you are paid for each assignment. I started as a three and I see that they do have a number of assignments at level 4 but I have not seen any listed yet at level 5, which I understand is difficult to attain.
Looking up textbroker tips, I found a very interesting blog written by a newly minted freelance writer. She seems to give a lot of great advice on starting out in freelancing, particularly using Internet tools. It's called Adventures in Freelancing.