Your own/company provided laptop. Smaller the better.
On the app side, I like CCleaner. Its recommended by MaximumPC magazine and its great at cleaning registries, temp and other garbage files and can even uninstall programs for you.
It does a lot and its free.
IT Admin (PBX Newbie)
Nortel Option11
Version 1411
Release 21
Issue 7+
MerMail 10.7.2