For really long-term stuff (like 5 years), I just schedule an email to myself—it’s surprisingly reliable and future-proof.

For anything up to ~1 year, I mostly rely on Siri to set reminders. It’s quick, hands-free, and works well if you’re consistent about using it. It sends a notification on my iPhone at the exact date and time, kind of fire and forget.

Not a perfect “brain dump” system, but this combo has been pretty low-friction and dependable for me.