she/her
Take breaks (ideally in the form of walks), explain the problems you’re trying to solve to people willing to listen or to inanimate objects (rubber ducking), and engage in as many different perspectives and ways to approach problems as manageable (as opposed to as many as possible).
Your subconscious will sometimes work on issues in the background as you take walks/take a shower/etc, and knowing different ways to organize and approach things will give your mind more ways to consider when working.
Working continuously on problems without taking breaks can trap your mind in little loops, where all you’re doing is trying to solve things in different variations of the same thing over and over, Escape the loop, and remember that you and your subconscious are parts of the same whole.
sounds like you have a lot to learn yourself