I know that feeling bro,
Have you ever considered trying the lite challenge (or the Challenge, but this is harder )? It is a good way to make you build faster your maps, as you have a extra motivation, the limit date, when the posting is closed and the voting starts. Of course you'll have to follow the challenge idea, and not just make any random map, but still it's good so you learn how to use better your time.
Just an idea... Good luck anyway,