Complete Calisthenics - Ashley Kalym

80:20 rule
It may seem as though the total number of different meal ideas is somewhat
limited, and this is true. But remember, we are not wholly concerned with taste,
but performance. If you are not completely focused on performance, and just
want to get as strong as you can but still eat what you want sometimes, then you
can follow the 80:20 rule. This simply means that as long as you eat well 80% of
the time, you can eat pretty much what you want the other 20%. One bad meal
out of five should not be too detrimental to your progress, and will still allow you
to thoroughly enjoy your life and the food that you eat.