We tell people to not forget things all the time. But this gesture serves solely as a friendly reminder. But do we have to be so negative about it?
We hear the positive inverse of the phrase a lot less often. "Try to remember" would be an acceptable equivalent.
Remembering things in today's digital age relies on the individual. It's everyone's responsibility to hold their own processes these days. That's why apps exist. That's why Siri exists.
Please remember to save your reminders in whichever way works best for you.