What works for me: e-ink notebook (like Supernote, Remarkable, Boox Note). My "todo" notebook is like 2 pages long divided into stuff for today and stuff for future. I could use a piece of paper of course but:

I erase things that are either done or no longer relevant (they don't become visual clutter)
I can reorganize stuff on my todo page when I feel overwhelmed or move it to other pages if I don't want to focus on it today
writing things down manually with a pen instead of using a keyboard makes it easier for me to remember
picking the device I won't get distracted by notifications or other apps because I don't have any