What non-essential directories can I exclude from TimeMachine? I want to have the most # of backups of my actual files, not of temporary files, and easily restorable data.


What can I exclude from a Time Machine backup to get the most efficient backups?


(I use VMs, so tips for Parallels, Virtual Box, etc, are welcome)

In the sample below, I blocked 


Backups of all Drive sync technology (Google Drive, One Drive, etc)
Xamarin project output (in the Simulator).  All this is stale cached data
iOS emulators with Xcode.
Stuff in the MacOS app store
Stuff in the iTunes App Store
Backups of my iPhone devices
Most efficient backups would mean leaving Time Machine alone, not twisting knobs randomly.

The only thing you should be excluding are the VM's.