It's going to take a little effort to think of topics for each letter of the alphabet (although Sue is steaming through them!) and Imagination and Ingenuity will be called for.
But there is huge satisfaction in using ingenuity to solve a problem! I enjoy solving sudoku and crossword puzzles but they cannot compete with the satisfaction I find in thinking of a substitute for an ingredient needed for a recipe but absent from my cupboard. Or finding a route to avoid roadworks. Or making do and mending rather than going out and buying more stuff.
There is such satisfaction in a lightbulb moment! When one has almost felt defeated by a problem and suddenly a solution pops into one's head and it really works! Roll on lightbulb moments!
Now, I wonder if a little ingenuity could help me find a subject for J? Somehow, I don't think that will be too difficult! (Somebody has been dropping hints!)