I find it's easier to stick with my fitness and nutrition plan during times when my life is "routine." A regular schedule--wake up, work, workout, eat dinner, etc.--seems to make things easier.
Weekends, as a result, make things more difficult. So do holidays. Like yesterday.
Even the weather has interfered with my routine. The roads are too snowy for running... too much ice, not enough room on the shoulder. So I've had to bring my workouts inside. My runs are on the "dreadmill." It interferes with my mindset, I think. I just don't get the same thrill from a run.
Fortunately, the weekend and holiday are over. I am back on schedule today. Back to work. Back to the routine.
Now if only the snow would melt.