Divide and Conquer
U can make progress on any problem. U might see a problem that U can immediately solve. U can then choose to immediately solve it. For the remaining problems ask yourself, "what prevents me from solving this immediately?" Asking this question will cleave out subproblems. Maybe U need a tool or resource, maybe U lack understanding. For each subproblem U can either solve them immediately, or U can recurse.
U can always Do Just a Piece of the problem. Often other aspects of the problem will spontaneously clarify themselves as soon as U work on any aspect of it.