I type my name and email address dozens of times a day…

I have two text shortcuts set up on my Mac, px and pz, which, when I type them, automatically get replaced by Peter Rukavina and peter@rukavina.net respectively. Setting these up is easy: System Preferences > Keyboard > Text:

The Text Shortcuts tab in MacOS System Preferences

Given that I have to type my name and my email address dozens of times a day, this is a big timesaver.

The key here is to make sure you don’t use a key combination that occurs frequently in nature: on my first go I set pr as the shortcut for my name, and got really confused every time I typed probably or procrastinate.