Creating B.O.C. Time

Very few writers only write. Most of us are juggling multiple jobs, both inside and outside of the home. So how do we find time to write? What I'm finding is it changes with the season my family and I are in at that moment. One thing I have learned very well is that without consistent time with my butt on a chair (B.O.C), I will never, ever, ever meet my writing goals and deadlines.