Reasons to document: – keep track of your own steps (go back to decisions, and realize perhaps good decisions were made with limitede outcome) – share the steps with others (not just the final outcome), so others can see what worked and what not, and build on your path walked and perhaps continue and extend what you did (open source principle) – look back with a distance of a few years, and realize perhaps on a meta level why you did certain things, and where it lead you to, which without those projects would not have done (meta reflection on life)