Schedule, schedule, schedule

So I've decided the most difficult part of about trying to lose weight is my schedule.  The long hours are difficult, but developing a habit is even worse.  It takes time to make a behavior a habit.  For someone who is not big on exercise the exercise itself can't become a habit at this time.  My problem is that my schedule changes every five weeks.  I get in a habit with one schedule and then it changes.    Then I don't go to work out and my eating habits degenerate.  It takes me a couple weeks to get back in the groove and then it changes again.  I can't wait until my schedule is more "normal."