Better yet, walk around and look photobank what there is in demand and make it better. Ignorance and misunderstanding of what to do. Well here is just simple -) have to work and keep learning. Colonscopy will undoubtedly add to your understanding. Sending and receiving of failures usually prihzodyat letter explaining why your work is not accepted. These can be noises, no Stock focus, bad composition for example. I'd add that you start working with photobanks I became more photograph plus mastered vector and 3d max. The constant lack of time or just too lazy to global. At this point I can not help you anything -)).
This is a very big problem with which you yourself have to deal with. The man calmed down and slowly stops working. Yes, many have begun to receive some income from the Internet, they say to themselves 'that's what I'm tough' or 'At last I did it' and slowly stop working by switching to something else. But here as On the contrary to do things. If your work are called for in the photo bank, so there were regular customers who will sometimes go to your page again and buy your fresh work. And you just stop their activities. So do not be categorically. Creative crisis.
Writer's block, I usually decide the case. First looks at the network a bunch of photos on any topic. Of course, it must be professionally photo done. And after watching just such a beautiful and very well wish to do something similar. That's why I decided to master the vector and max.