My favourite shell trick is to comment my code:

  $ some_long_command -with -args -easily -forgotten # thatspecialthing

... Some weeks later ..

  $ CTRL-R<specialthing>

.. finds:

  $ some_long_command -with -args -easily -forgotten # thatspecialthing

Need to see all the special things you've done this week/whenever?

  $ history | grep "\#"

...

Makes for a definite return of sanity ..