Start with the basics and spend a ton of time with them. Try not to move on until you're very solid on the fundamentals of a particular topic. Moving on too ear

Start with the basics and spend a ton of time with them. Try not to move on until you're very solid on the fundamentals of a particular topic. Moving on too early is by far the most common root cause of the problems math and physics students have learning. Do as many problems as you can. Assume you don't understand something until you've done lots and lots of practice problems. "Math is not a spectator sport." I think that's from "How to Solve It". It holds true for physics. If there's a specific level or topic in math/physics you're looking to learn, post it and people will probably be able to give you a good recommendation for a book. Also, if you're not extraordinarily comfortable with algebra (manipulating equations, basic trig identities, log and exponent identities), go back and start there. Everything is so much easier with that skill under your belt.