Put up a few interesting Autocorrect options in your victim’s Word. (Mind you, this is really evil and they may not necessarily notice, especially if they prefer the “single eagle striking from the sky” one-finger typing method and look at the keyboard as they write, so make sure they won’t be writing anything terribly important.
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 Old, but unfailingly effective – Hide loads of alarm clocks set to go off at different times around the victim’s room. It really isn’t funny after the third alarm goes off – except it really is!!!
    Compiled from the internet