If you have a tough physics problem, you might hesitate to even start it.
That won’t help your cause though…..
Use lots of paper and just write down what comes to your mind.
It might be completely wrong, but it doesn’t matter, you’ll find out pretty quickly by doing simple checks (dimensional analysis, feasibility, etc)
Thomas Edison tried 10,000 materials for filaments before getting the electric light to work.
And complex physics problems can get somewhat ridiculous.
If you start a problem earlier, it will be in the back of your head.
Professor Barber even told us that he has gone to sleep and woken up with the answer.