Nothing but your immediate experiment.
Use secondary containment.
Waste to be removed at end of day!
DO NOT STORE WASTE IN THE FUME HOOD. If volatile, use a tight fitting lid. You can use the hood for transferring waste to the container, just don't keep the container in the hood overnight.
DO NOT STORE CHEMICALS in the fume hood unless they are for a current experiment in progress that needs the fume hood.
It is illegal to intentionally evaporate a solvent from a material for purposes of waste disposal. Just give EH&S the entire package with the solvent for waste disposal.
The drains have been plugged for a reason. NOTHING is to go down the fume hood drains.
REMEMBER: fume hoods are intended for use when you are doing something with a volitile hazard.
A good example is formaldehyde solutions. Formaldehyde is a strong smelling carcinogenic fixative. It should only be handled in a fume hood and the handler should wear gloves and work carefully to minimize exposure. Perfect use for a fume hood. However, if the hood is not free of clutter you will not be able to work safely.