David Studholme wrote:
Up until now I have used scraps of paper.
If you want to make your scraps of paper system virtual, try using Tomboy Notes for Gnome. It sits on your panel allowing you to create post-it notes on your desktop. It works in a wiki-like way linking between notes simply by writing the title of one note in another. There are various other features you might find useful.
I use it primarily for storing things I often forget...
http://www.gnome.org/projects/tomboy/
--Simon