Don't sweat it.
I don't write anything down, because I'm doing simple periodization and I don't need something to think about.
I'm doing this complicated (for me) program, where I start with sets of one "primary" lift, heavy for low reps; then sets of a couple "secondary" lifts, medium with medium reps; then a couple of single-joint assistance exercises, light for high reps. Then some shoulder rehab exercises. The primary-secondary-assistance lifts rotate every workout (though the shoulder stuff stays the same). It's fun and I'm making progress, but there's a fair amount of details. Having it all written down helps.
Thinking & remembering become tough for me when the sets become challenging. There's a lot of "Now where was I?" or "What was I supposed to do next, again?"
That’s why I like simple programs: load the bar with a weight you positively know you couldn’t do five reps with and do a bunch of singles and doubles with a fair amount of rest between sets. That’s it.
The next few sessions you won’t have to worry about any details at all. You just repeat the same workout until, say, ten sets of doubles becomes way too easy. And you don’t even try to beat your previous records; just let progress ebb and flow and it will happen naturally, eventually.
Then you start the process all over again, this time doing triples and sets of four with the same load you used with singles and doubles. And you keep doing it until, say, six sets of four becomes too easy.
And you keep working with that same load until you can do with relatively ease four sets of eight reps with a weight you barely could do a double when you started. Thing is, it’s been months since you last had to think about weights, sets and reps, you didn’t need to wonder what’s next or check your previous session’s numbers.
Then, you pat yourself on the back, bump the load substantially, and start all over again. Mindless lifting.