I'm forcing myself to remember this today. Last night at the gym, I added more weight to half the machines I use because they were getting too easy. This morning, I am more sore than I have been in weeks, with a killer headache to top it all off. My first instinct is to skip going to the gym tonight, even though it's a cardio night, but rather than make that decision now, I'm going to plow through the day and evaluate how I feel after dinner.
Right now, however, I'm going to get coffee, ibuprofen, and put this on a sticky on the corner of my laptop so I don't forget it today.