I am not sure which would suit best, but some kind of password manager would be really handy. 
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Password manager
June 13, 2006 - 7:57pm
#1
Password manager
June 21, 2006 - 5:56am
#2
KeePass
Been using KeePass
KeePass
Been using KeePass for a while now, it works well, no trace left on the pc, just setup the DB in the same folder as the EXE. Might be a possible candidate for PortableApp-ness 
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