My 'thing' is saving time through process and, possibly more importantly, automation.
Once you decide on a particular way to do something that will be the same each time, you can record that process so that everyone knows what to do and how to do it. This will in itself save time because you don't need to think about how to do a task each time you come to it and also because you can delegate more easily when you have a set process.
However, the real time saving comes if you can automate things.
It's often the case that you will be using a number of different systems in your business so you'll argue that things can't be automated because a person has to manage the integration of the systems - but that is not necessarily the case any longer.
Zappier is a cool piece of software that will talk to lots of different software and "zap" information from one to the other on an "if X then Y" basis.
This makes process automation between different systems that you're probably already using in your business a real possibility and you'll be amazed how much time you'll save when things just happen "by magic".
To have a look at some popular "zaps" click here.