Examples of my stupidity:
1. I found a way to do my running such that I was improving. (Each week two days hard and then two days extremely slow/easy but the longer, the better). Did 5 miles at 7:25 pace that way. But I was so bored with those long slow runs that I instead wandered off in a different direction. Injured myself with that... then have wandered all over the place but haven't gone back to what worked. Finally it occurs to me that since I'm using a treadmill now, those long really slow runs aren't so bad. Not really a problem to watch TV during them.

I'm stupid because I didn't just use the treadmill 15 months ago for the long slow runs and stick with what was working. Why didn't I use the treadmill? Was this pretreadmill running for me? I think so. Or maybe it was broken? If the first, then it should have occurred to me. If the latter, I'm still stupid for not figuring out how to fix it. (Finally did.)

I stuck the microphone outside of the 7 by 7 ft room where I used to record music. It's basically a large closet. I finally just put it about ten feet away in the main room. My cello sounds so much better. Huge difference. It's the difference between trying to record multilayered cello songs, and not bothering. My vocals are even quite a bit better.
I'm stupid because it took me years to do this. I had thought of it a few times... but for some reason I never did.

There was some other example of my stupidity. I can't remember what, but not being able to remember is also somewhat of an example.

It's more laziness really. I could have managed these things....

I'm still doing it. But don't see a way out.