Regardless of your campusing ability and experience, plateauing is a common problem. The main reason for this is that the next hardest move/goal is often much harder than the move you've just completed. I recommend having parallel goals on the same rungs and alternate goals on other (bigger and smaller) rungs. Clearly, trying a specific goal is one way to train for it. The next most obvious method is to simply try the goal on bigger rungs. This article covers the less obvious ways to train for a specific goal; the methods I cover here are: Drops, Component Moves, similar moves on the same board, and Stacks.