Everyone has those own little workarounds that make life easier.
Here are a couple of mine -
1. Using AutoHotKey to write my signatures, frequently used expressions (ex: plm becomes "Please let me know if you need some more information." , answers to frequently asked queries by customers, open specific files with a keyboard shortcut)
2. Using IFTTT : This tool helps a lot. One of the ways I use it is to save my monthly utility bills (arriving in Gmail) automatically every month direct in my chartered accountant's shared dropbox folder. That email in turn is auto archived, so such bills are completely out of my way.
What are your time saving hacks that you use frequently?