Having worked in tip dependent jobs in the past, I'm a decent tipper. YMMV
I think you should just adopt a life philosophy about it and follow it. For example, I have a life philosophy of never ever buying the extended warranty for anything. Lol, sometimes a salesperson is pushy about it and I just say "sorry, I'm following my life philosophy."
Live philosophy on tipping: Tipping is a privilege.
-In the US, mine has always been to tip a buck or two even for take out if it's a normal restaurant because often the person who is handling that might not seem like they are doing much but they are probably getting paid server-level low wages.
-I tip more if they are running it out to my car.
-In seated restaurants I tip between 15% and 20% because that math is so easy to do in my head.
-Bartenders and bar waitresses get a buck or two per drink regardless of how much the drink costs (even if it is free at an open bar).
-Baristas get a buck in the jar, not that I buy coffee out much, so it's a special treat.
-I tip $4-$5+ if someone else drives the food to my house, way more if they are shopping for and delivering my groceries (not something I ever did until we got quarantined last March).
-I don't tip for fast food. . . that just never occurred to me.
-I tip hotel maids $5 per time they are cleaning my room.
-I tip drivers 15-20% if they get me somewhere safely without making me fear for my life.
-I rarely use valet parking but tip a couple of bucks coming and going when I do . . . my vehicles are crap so I'm sure they aren't expecting much from me.
-Solo musicians including street musicians get $1-$5 as I leave if I have been entertained, and I've been known to tip a band of musicians up to $60 (when I was very highly entertained and a little drunk).
-I tip private travel guides (nature park guides, rafting guides, etc.) around $20 if I've had a good time as a result of their guiding.
-When traveling to other wealthy nations I just go along with whatever the little game is in the restaurant . . . I always opt in for the bottled water they offer and little olives or crackers or whatever at the beginning, which gets things off on the right foot, and then I tip a little bit on top at the end as long as they've been friendly even though it's not expected in many other countries. Seems to work well.
-When traveling to less developed nations, I tip an unreasonable amount, often equal to the amount charged for the goods or service if not more. Not sure why I do this except for guilt at my good fortune of being born into a wealthy country. At all inclusive resorts that "discourage tipping" I tip like crazy, lol, because I don't like being told not to tip and it's fun to watch how fast a tip can get pocketed smoothly under this system.
I'd tip more if I had more walking around money. Funny how cultural and senseless it all is.