Contrary to what we might think, it's not the big changes that contribute to the degradation of good practices and habits in our life. It's the drift.
The drift is like that insidious snake that creeps in and slithers down your throat and convinces you that it's no big deal to skip a day at the gym (it's only going to happen just this once, right?) or to break your sleep schedule just this once, or to avoid this or that piece of work.
The drift sets you up for the big failures and all the devil asks for is a toe-hold. Then he's ready to jump on your back with a knife out to do his dirty work.
When the "little" things aren’t important convincing arguments pop up where you would have once been steady as a rock. Fight against the drift and stand your ground even on the little stuff.