There are no tricks because you're too smart to fall for your own tricks.

The one thing that works is the time buffer between your future self and now.

The real challenge is to override the sadness with new memories.

Doing all the things you listed (dog park / build sth. / books, etc) makes the time go by faster, especially if you find something you like.

Stay holed up, and the sadness keeps resonating, building its harmonics (reliving past images, what ifs).

Everyone has their own pace. Stay strong.

> fixed up the blinds or cooked pork steaks

I know how it feels. Wish you the best.