Ask what would have to be true for the problem not to exist.

Working backwards from the absence of a problem often reveals more than staring at the problem itself. Asking what conditions would need to hold for this difficulty not to exist produces a specific list, and comparing that list to your situation shows exactly which condition is missing. That missing condition is your target.

Try it on something stuck. Describe the world in which this is simply not an issue, in concrete terms. Then identify the one or two things that differ from now, and work on those rather than on the difficulty in general.