Here's a thread from the archives that might give you some ideas:
http://www.chess.com/forum/view/general/characterizing-rating-levels
Common Stuck Levels
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I am about a 1500 level player (turn based) and about 1300 live. I feel stuck at that level and I am wondering if there are certain rating levels where it is common to get stuck and if so can anyone talk about the changes in thinking or training that are required to move past those stuck places?