Manage your time. A simple mistake plenty of us make is that we do all the right things...we just don't do them in the right order or we spend too much time on the unimportant or during our most mentally productive hours, we end up eating nachos. Time is, unfortunately, of the essence, it's fleeting, and a stitch in it saves 9 later. If you get good at managing it, you may even find more for the fun stuff.
A simple way to start is to identify how you waste it. Instead of trying to restructure your entire day's routine, just see where you're not really doing all that you could be doing with it. That hour you spend on Facebook a day? That's a decent place to start.