If you are quite the prankster sort, then there are various computer tricks you can play on your not so savvy less computer literate friends.
Previously, I had written how to open 2 facebook accounts at the same time, following which you can be in two different facebook accounts and play prank on your friends.
A reader recently asked me if they could log into two MSN Live messenger accounts at the same time. Read this post to learn how to make it possible to be logged in to two different MSN live messenger account from the same computer at the same time.