Know when to take day off. A program is a program, which is great for making you stick to your routine, but the variables always change. Sticking to a program is not as important as getting adequate recovery (and recovery is progression). If you’ve missed sleep, been out on the razz or been under buckets of stress, maybe adding physical stress isn’t the right thing to do, even if it seems so psychologically. Take a rest, chill out, do what you love and smash it again the next day!