Unfortunately, I've tended to find that when I keep physical notes they get lost. Notebooks get misplaced, sticky notes fall off or get ignored, all that stuff. Since I'm a gamer one of my friends recommended I try Habitica, and that's been my life-changer for to-do lists.

One of the best features I think is the ability to list stuff as a daily or one time to-do, and when you check it off you earn exp to level up your character and gold to spend on things on the site that are mostly just cosmetic for your avatar if that's your thing. There's groups you can join to do quests, guilds around all kinds of topics that do challenges, and a much more social side if that's something people want to do.

I also have a channel in the discord server my roommate and I share (mostly for exchanging silly photos we find online and the like) to write down things as I do them. Really good for keeping track of things like what day I did laundry last or the dishes or something else XD