Funny you mentioned that.. I have a neighbor who is 92 and that's the first thing he told me when we started. "Don't try to do too much, you have the rest of your life. Just take your time and enjoy it". I think he noticed that I was stressed about all the stuff we wanted to get done.
BTW - I'm enjoying your posts as well. We just planted 300 garlic cloves a month ago! Fist time ever.