Change the coffee in the office coffee maker to decaf.

 1517

1  

Install the Blue Screen of Death screen-saver on someone's computer.

 880

3  

Remove the shower head and place a chicken bouillon cube in it, then put the head back on.

 722

1  

Paint a bar of soap completely with clear nail polish so it won't suds up.

 801

1  

Place a pair of pants and shoes inside the only toilet stall in a rest room to make it appear someone is using it all day.

 788

1