I discovered that my blood pressure had been going up on Sunday evenings.
For my entire life, Monday morning meant going back to work, and I was (unknowingly) priming myself for that on Sunday evenings by thinking about what I should jump into Monday morning. Sundays became much more relaxing.
Yep. I remember a month in I was removing a very large shrub and the job was going slower than expected. I was trying to hurry up to get done in daylight -- that would be my normal response when I used to do these things on weekends.
Then, I realized that if I didn't finish today, I had nothing scheduled the next day. And, heck, if I didn't finish the next day, there was a whole day after that....