Most efficient way to study?

 Hello, I'm currently in the process of studying and self teaching myself a few different subjects. Primarily math and Physics at this time. I'm doing this because i will be attending college in about ten months with the goal of obtaining an engineering degree. I graduated high school five years ago and have not been in an educational environment since. I am looking to get opinions on the best way to study mainly these two subjects, for now. For example should I do two hours of math and two hours of physics a day, or math one day with physics the next.  Any and all advice is greatly appreciated.