I've noticed...my willpower to resist goes down proportionately to the degree to which I 'give in' and then it spreads from one area of my life to another. When I give in, for example to sugar, I want more sugar. When I give in again there, I tend to become more willing to compromise in other areas. I then notice a kind of defensiveness creeping over me. When I become more defensive, I doubt myself more and then more. It works like a series of falling dominoes.
In my experience, the opposite is also true. When I don't give in, depletion of my willpower seems to slow.
