For example - one program at work has this annoying popup which requires me to put in my username/password but in a strange format that I can never remember - I have an email from a colleague telling me what that is. Another has quick instructions on how to find something on my health insurance website (because it's really counterintuitive).
I've got about 50 or so emails like this, with instructions for things that range from one line to a page of text or so. I have them in a folder in my email program. This works pretty well (and it's good in the sense that I often remember "oh, I remember getting an email about that" so I know it's there). But I know some people are intent on getting everything out of email and only using it for communication, and more importantly I have many other notes like this that are stored elsewhere (text files, documents, etc.).
What's the best thing to do with all of these notes (email or otherwise) so they're easily accessible and I can quickly find what I need?