How do you track your many (super-genius-one-in-a-million) startup ideas? I will not promote

I’m curious- where/how do you write down ideas? And follow up, how often do you go back and play with your old idea catalog? Personally I have it in plenty of scribbles on notepads and also write myself on Messenger if I do it on the phone. But I wish I was better at looking at them again, 2AM-sleepless-me is kind of a genius sometimes! What do you all do?