A few tips for more security (Score 1)

Got 3 tips for you:

1) Use cut & paste (as stated in more comments), but store your passwords in an NTFS-stream. This worls only on NTFS formatted devices. It's simple, create a dummy textfile like music.txt and put some silly information into it. Then open it using the command "notepad music.txt:pass". this 'pass' will be an NTFS stream wich is attached to this file but the contents is not visible in the original textfile, neither will the filesize inclease if you fill the stream with information. Besides that, it's relatively hard to detect wether a file has streams or not, what the names of the streams are, so if you lose your memory-stick the information will probably not even fall into the wrong hands. But be aware, copying the file to a non NTFS formatted device will erase the stream, so store a copy at home in a safe place!

2) If you do not trust publicly installed applications, build and use your own using virtualisation-software like "Thinstall"! It results in 1 single executable wich can be run from any device you like!

3) If possible, check all wiring of the keyboard. Many keyloggers are simply a small piece of hardware no larger than a plug, connected between the PC and the keyboard, and many of these can be accessed wirelessly to extract the collected information.