Maybe you're already a fan of Stickies? Jim Hamm sends this note: "The Stickies app (not the Widget) can be very helpful in quickly posting notes that you want to keep as reminders. Following is a link to an article that provides more info on Stickies."
"If you're in Safari and want to quickly save something, highlight the text and/or image, then do Shift+Cmd+Y and it will be automatically posted into a Stickie note. If you're in Mail, highlight what you want to save and drag it to the Stickies icon in the Dock and it will be posted to a Stickie note."