I always do my thing on the commandline and I have never really mastered all the nifty power user stuff that ZSH provides.
One of this is the commandline editing command using the Bang (!) /exclamation point. This command saves one a lot of time retyping on the shell. This basically allows you to access the history file and do some cool manipulations like searching and editing.
Now I just need to practice this newly found power I have. Hurray to Zsh!