Books Recommendation: Breaking down a problem into sub-problems (in general)

Whenever I have a problem (in general) to solve which I have not seen before or solved before, I find it difficult to approach and break down into small subproblems and then I start procrastinating and avoiding the problem.

I would love to know your approaches/experiences. It would be great if you could share how you learned the art and can also recommend related books.

Thanks!