I have a paper calendar on my wall. It’s really nice because I find writing things down helps me remember, and also because you can get ones with different pictures or jokes or facts or recipes on the other side, so you get a new set each month.

Also if you follow two calendar systems it’s particularly nice because they can both be on the same calendar. (For example mine is a combined hebrew gregorian calendar, which is much nicer than just having the computer tell me when holidays are)