I can also keep a backup on site at the client's premises where no-one except those who know the passphrase can open it. To get access to the drive quickly, I have a shortcut on my desktop that runs a batch file. The batch file contains the following:
@echo offWhat does it do? It checks to see if drive X: exists, and if so, opens the directory. if not, it uses TrueCrypt to mount the directory (after asking for the passphrase) and then opens the directory. Either way, by the time it has finished the directory is open and I can begin work. Simple, yet so effective.
if not exist x:\nul goto TCMount
echo Please enter TrueCrypt password
"C:\Program Files\TrueCrypt\TrueCrypt.exe" _
/l X /v D:\DonnDev.pgd /q