The key to proper fitness is a routine or regimen, period. That doesn’t mean you can’t cheat on the weekends, or take the occasional day off. However, it does mean that you should nail down a pattern and stick with it. In other words, if you’re going to take a day or two off, make that part of the pattern by taking those days off at the same interval every week. By firmly establishing a routine, your mind and body will follow suit.