If you’re looking for problems, you’re likely to find problems. And the same, of course, goes for the solutions.
The trick is to know when you should be looking for problems instead of working on solutions.
There’s no easy way to answer this, but as a rule of thumb, you’re better off working on solutions instead of looking for problems.
A problem will appear on its own anyway. And once it does, you can (and most likely should) look for a solution.