Once you know what gives/takes energy, create a mock schedule that provides balance between the two. Then, play with the numbers to create an ideal balance.
For me, work is an energy-taker, but it's essential so I can do things that give me energy, like play games, volunteer, work out, etc. I've found that when I work 50-60 hours per week, I really just need about a solid day where I can just do things that give me energy, so Saturdays I keep free to play, hang out, and only do things that give me energy. Sundays I balance my time with things that give me energy (like watching football) and things that take energy (like chores).
That's sort of the high-level planning I do. On the micro-level, whenever I do something that gives me energy, I devote as much time to it at once, in bulk. This allows me enough time to become bored with it (if it's video games or working out), and make me _want_ to spend my energy that I've accumulated.
When doing something that takes energy, I do the pomodoro technique, where I spend 25 minutes working, 5 minutes off. I do email, get some water, stretch during that 5 minutes, and then immediately get back to work. That essentially gives me 16-20 "buckets" of time to work on my projects (8-10 hours), so I break my work out into those buckets, and plan accordingly.
I'm an accountant, so this may be different. I know some people love their work and work gives them energy, so they could have a totally different style. But I'm happy :)