Zsh
I’ve been using zsh for about 15 years but despite this I’ve noticed lately I’m pretty inefficient at editing commands in particular, mostly because I don’t have a clue about emacs keybindings. I am however very familiar with vi bindings but my config was never properly setup for zsh, I couldn’t search history like I could in emacs mode and I’ve been blundering along in this state for too long. (turns out it was just because the bindkey’s were not declared after doing bindkey -v to go to vi mode, oops)
I spent some time recently revamping my zsh setup, something I haven’t really spent any dedicated time with since about 2006. In transitioning to oh my zsh I discovered fasd, a command line productivity booster. Essentially it tracks the files and directories you work with in your terminal, and ranks them by “frecency”, both frequency and recency. You can then reference them with short, usually single character aliases and fuzzy matching.
Examples here will assume the suggested default aliases from the github readme. A couple parts are only available with zsh, but most of fasd is perfectly usable with bash as well.