I have a
small notepad pad that I write on. It begins looking like that as I sketch ideas for page layouts and stuff on it. Write down phone numbers, etc.
Projects all go into Omni Focus.
Generally either before I'm done at the day or the start of the day I'll list out a list of a couple things that I kinda make my items that are a priority for the day. Basically based out of what I have in Omni Focus or what my lady has mentioned to me. (like get some milk, etc.)
Generally I'll store the notepads for months after I have even filled them up. Phone numbers or ideas I need to get back to down the road I can just pull the pile of them back out and flip through.