My recommendation is a small thing: a trashcan with a swinging lid!
Covers the trash, reduces smells, will prevent trash tetris (sometimes), and very good instead of foot-pedal opening trash cans or trash cans put in a cupboard.
Another thing are toothbrush holders that stick to mirrors. Might jog that memory of needing to brush your teeth!
Wall-mounted keyholder by your door, too. Anything I put on a flat surface will eventually be lost or covered with more junk & papers. My keys are WALL-ONLY!!!
What item(s) have helped you with your struggles?
I’ve been living in the same place for 13+ years and I’m moving this weekend. I’ve never had to call someone to bring me a spare set of keys…
…until yesterday. I had my spare set of (just) car keys next to my normal set of all keys. I have a club on my steering wheel so I couldn’t even go do what I was going to.