Aaron Mahnke on remembering things:
Unless you happen to be my wife, I’ll bet good money that you are going to forget something. Don’t trust yourself to remember things. Build a frictionless system and run with it. Your freelance career, relationships and hobbies will all benefit from taking action.
My frictionless system consists of capturing tasks and ideas in Drafts on my iPhone from which I can quickly file them (with reminders) in Omnifocus or on my calendar.