The two basic parts of Trulia ae Q and A and it's blogs. With Q and A, You need to be helpful and consistant. You need to answer teh question they are asking. If you do not know, do not answer. NEVER just write ask your agent, what does you agent think or seek a lawyers advice. It is not helpful and disrespectful. Offer an answer and a reason why. NEVER ask for a thumbs up and try to refrain from asking them to contact you. If your answer is helpful, comsumers will contact you.
With blogs you need to blog daily, writ on topics you specialize in, write about local information or events but DO NOT just write list with my i'm the best and sit back and wait for the calls that never come. Blatant self promotion drives consumers away.
Mack and Debbie offer some great advice, we have all been on trulia for quite a while and seen many changes some for the better and some for the worst but we see more agents come and go that did not give it an honest try and sought short cuts or to bypass what Trulia is all about.