Finally handling everything at once

I guess I just let my mind wander and think of all the things I have to do in a days time. Sometimes it seems that I will never get anything done. Especially when it comes to schoolwork, I think to myself wow all this work has to be done and when will I find the time to do it all. Then once I sit down and start working on the units it seems that it goes very quickly and I have time to just relax and do other things that I thought I would never get to.