Some links may be helpful:
Specifics about what to learn, how to learn.
VERY IMPORTANT. Protects you from crackpots and in a humorous way. You may want to change your username after reading that, too : )
Quite incomplete, I hope it will be completed soon.
Follow the order (For learning) I give in my linked answer, since it prevents you from becoming a crack, and helps you go in the right direction.
Learn the math(s). Mathematics is a generalisation of Physics, and Physics is all about finding which is the right special case of Mathematics.
Don't get too excited by Popular Science, such as mkaku's books, which may make you a crackpot, too.
Don't get misdirected by trolls, either.
Don't get into the mathematician's world either, rigorously proving everything obvious. I honestly get very scared by Math Overflow for this very reason.
Read Ron Maimon's, Lubos Motl's, Mitchell Porter's, Urs Schreiber's, Moshe's, Squarks's and Dilaton's posts on [physics.se] /.