When driving in snow, it is a good idea to occasionally give the wheel a little wiggle or tap the brakes when you’re in a safe spot. This test gives you an idea of how in control you are and how responsive the vehicle is(in the current conditions). It reminds you of the limits of your control so that you can account for them. Likewise, you can test yourself by temporarily abstaining from good things like food, sex, entertainment, etc. Then you will know if these things serve you or not.