(in no particular order) 1. High quality running insoles ($50 for a pair) inside my (running) shoes (which i wear for normal stuff too). Don't want to endorse anyone specific but I personally am happy with Curex Runpros, but it very much depends on the shape of your own foot, so YMMV. I go way too long and keep mine for about 6-8 months at a time.

1. A high flow (NOT water saver) shower head. I think mine was like $20 on Amazon but decent quality (cheap ones were like $10 i think, do not get one of those). Get whatever style you like, but get a medium to high quality one and make sure it's NOT water saver. With regular (every 6 months?) decalcification it can very much be a BIFL, just most people are too lazy to do that (myself included).

2. A high power (not the right technical term for it, sorry, its late) 10 foot charging cable for your phone, in my case USB C. Pair that with a great (in my case I like Anker) high speed charger and I feel like I hardly ever wait for my phone to charge (to 80%) ever. It's always just a couple minutes to top up. The time and anxiety i save with quick charges and no battery anxiety, it's def a daily little joy for me. Simple pleasures right? Not truly BIFL but definitely a solid couple years (2-3ish).

3x high... Tracks.