Every opportunity to fix something is an opportunity to learn. Try to keep this in mind, even when you are working on that flat tire, in the rain, at night, in the cold. More than just learning on bike repairs, also try to learn from any issue that needs repair. Leaky faucets, a computer problem, a squeaky door, all things mechanical things offer chances to apply basic concepts of leverage, friction, tension, material strength, bonding and, hopefully, logic.