Flagrant self-promotion: if you're interested in this sort of thing, check out myscribr.com. We're all about preserving your life for future days.

We start by importing the information you're already posting to Facebook, Twitter etc. We'll send you a nightly email asking how your day went - simply reply and we'll save your response as a private entry. View your past on any day of the year, or browse through an aggregate timeline. When it suits you, you can click a few buttons and order your past in printed book form, suitable for shelving.