If you have an Ink Jet and not Laser printer: Ink Cartridge Low? Not true. this totally works, my printer stopped printing, saying there was no ink, I reset the cartridge and then printed 50 more documents and the ink still hasn't run out!
Using a candle warmer, melt your favorite scent, then pour into an ice cube tray. Freeze for about 20 minutes until hard and pop right out. Perfect for my wax warmer and old ice cube trays!