Today's tip comes from Charles Staley:
Performance, Not Pain
It's better to use your performance as a gauge of what you've accomplished than how much you hurt the next day. Numbers don't lie; if your numbers are going up, so is your progress. The reverse is not true however. I trashed my back a few years ago doing something really stupid, and trust me, the fact that I couldn't tie my shoes for a while wasn't a sign of progress!