With the 2GB drives costing so little, it's easy to bring all the tools you need anywhere you go.
Some of the basics -
All the tools from SysInternals - About 27MB (including RegMon, FileMon, etc...)
File Recovery software like Restore
File shredding utility
SpyBot/Adaware
TweakUI
SynchBack (Synch and file backup program)
AVG - AntiVirus
Folder with key XP system files
CCleaner
Opera/Firefox/Thunderbird
Slashdot Mirror
With the 2GB drives costing so little, it's easy to bring all the tools you need anywhere you go. Some of the basics - All the tools from SysInternals - About 27MB (including RegMon, FileMon, etc...) File Recovery software like Restore File shredding utility SpyBot/Adaware TweakUI SynchBack (Synch and file backup program) AVG - AntiVirus Folder with key XP system files CCleaner Opera/Firefox/Thunderbird