Pretend you’re a contemporary of Gauss. This should be good on many levels. You’ll feel motivated to work hard because if you don’t, Gauss will do it all before you. You won’t be afraid to ask yourself a simple-seeming question. After all, it’s only 1800. Maybe nobody has figured it out yet.
Try to come up with your own definitions before reading the definitions. Ask yourself what matters.
Sort of similar to the previous one, try to get an idea of what’s going on in a subject from an informal description (like certain wiki articles which don’t give precise definitions). Even try to solve problems from this, without having looked at precise definitions.
Talk about math with people.
Talk about not-math with people.
Don’t be discouraged even though you feel dumb all the time.