There isn't usually much tea left in my pot, but when there is I usually try to re-use it. It's a nice way to show respect to the leaves, and is a natural way to solve household chores without chemical cleaners.
this site recommends: soak pots and pans with a couple of teabags overnight to loosen caked on grime. I'll probably try it with leftover prepared tea to see if it works. We have quite a few pans that are grimy, and can use all the help they can get.
The tannins in black tea actually bring out the rich color in wood floors. DIY network recommends adding tea to the bucket when mopping hardwood floors.
Does anyone have any other household uses for tea? Definitely let us know in the comments.