There’s this thing I simply call “365”. With each new year (or sometimes at the end of a notebook, when I feel like it), I make a 2-page spread mind map of things that kept me busy. It’s more or less an analog tag cloud and it’s extremely rewarding to make. You get to browse through previous journals, look at things you’ve written down and actually managed to pull of, and take note of that in one or two words. That creates a thick cloud full of the things that defined you for the last year. It’s actually quite incredible to look at. When I’m done doing that, I try to underline the words that meant more to me than others. Applying the retrospective principles from software development on your own personal life and writing down what made you glad, mad or sad actually helps you do something about that.
This is an example of spaced repetition being done as retrospective and hiding some of the value of making the important things stand out and reviewing them for better long term retention.

