"Don't book yourself solid" alone is worth reading the whole post for. Over the last couple of years I noticed myself getting crankier, with a shorter fuse, more easily overwhelmed or worn down, and I had no idea why.

Then I noticed that whenever I tried to plan something with someone I had to book it a couple of weeks in advance, and whenever I looked at my schedule I got a sinking feeling in my stomach.

So I deliberately didn't try to plan more than a couple of things per week more than a week in advance. After about a week of this, I'm feeling better, more excited about doing things, and I'm saying no to most of the things I didn't really want to do anyway.