if she has a printer, Make some copies of a paperclip. Then put them into the paper tray of the printer. She'll go apeshit looking for the paperclip

Remove the desk drawers in the victim’s desk and switch them around. (If you can’t remove the drawers, just take out the stuff and swap it around.)

If she has a paperclip holder, take all of the paperclips out and link them together and put them back in the holder.

Transfer gay porn 1-800 numbers to her phone

Paint the tips of her pens and pencils with clear nail polish.

Change the language setting of her cell, windows, etc... to a foreign language.

Take an item from the victim’s office (something they use a lot such as a special coffee cup, stapler, pencil cup, etc.). Take a picture of the item and leave it on the victim’s desk (in the same spot where the item was located), along with a “ransom” note.

the list goes on...