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 ..

▲ scbrg 3 hours ago | parent | next [-]

I once saw this pattern referred to as a bashtag, which I think was an excellent name (no matter if you actually run bash as your shell or not).

▲ skydhash 5 hours ago | parent | prev | next [-]

I don’t keep history. Any commands I think will be useful, I save it in a script.

▲ senectus1 10 hours ago | parent | prev [-]

omg >$ CTRL-R<specialthing>

I could kiss you.. this alone is amazing!

	▲	000ooo000 8 hours ago \| parent \| next [-]
		!?specialthing? If you are feeling brave
	▲	fragmede 9 hours ago \| parent \| prev \| next [-]
		http://atuin.sh adds a database to store history in and a custom app to use for lookup with added modes to help with searching.
	▲	aa-jv 9 hours ago \| parent \| prev [-]
		Yes indeed, it is very fun to discover this if you don't know it already, it expands your understanding of your shell life immensely, doesn't it?