I have a Autohot key script that does the following:

Auto correct on some works i mis-type regularly

shortcut for server names, all our sever are formatted PrefixNumber, shortkey #number types the full name

Allows ctrl-v into cmd window

Fills in my default fields in our ticketing system

I date any note I take in onenote, #d shortcuts to todays date

Signatures for emails, #tr for Thanks and Regards

+- for ±

#desk/#mobile for my phone numbers

ctrl-alt-m to open a new email from anywhere

I don't think they save a huge amount of time in general but the prevent breaking your flow to check the date, remember my phone number etc which I think is more important.

Small but they add up.