Add "Did you know?" fortunes
Idea (from #zsh
just now):
Add some "Did you know…"-style fortunes (thanks @okdana for the phrasing), such as:
"Did you know that you can add %(?..%?)
to your prompt to show the exit status of the last command?"
"Did you know that you can write completion functions for your own commands? _mycommand() { _arguments 1:foo 2:bar }; compdef _mycommand mycommand"
Add these in the format used by fortune(1) and then run it at the end of zshrc.