The bathroom usually involves a couple kids in the tub.
The Basics (this is the 5 minute stuff that should happen every night)
Hang up towels.
Wipe up the toothpaste gunge.
Scoop cat box.
Empty garbage can.
Wash towels. (Yes, I wash them and hang them right back up on the hooks.)
Shake the rugs.
Check levels of hand soap/toilet paper/shower stuff.
Do a load of laundry.
Wash/fill pet waterer. (We have two... one in the bathroom, one in the laundry room.)
Dump boiling water down the drains.
Wipe down the door and light switch.
Sort some cabinets and drawers.
Wipe cabinet fronts.
Wash shower curtain.
Disinfect tub toys.
Use the drain cleaner grabber thing on the sink & tub drains. (The link is for one on amazon... I got mine at Harbor Freight for $1.49)