Besides using it as a fertilizer, how else can I reuse my coffee grounds?
An actual culinary application for used grounds: http://www.instructables.com/id/Gourmet-mushrooms-in-an-old-coffee-cup/
Grow mushrooms in them.
For those who collect kitchen scraps for composting, used coffee grounds are a great deodorizer for your compost pail, especially in large quantities (like if you do a batch of cold brew).
I myself use it as a universal scrub. Coffee grounds are much softer than the mineral abrasive or crushed apricot seed scrubs, and (unlike the latter two) it does not cause skin irritation, at least for me.
I typically wash it to remove tiny particles (so that it does not stain the tub so much) and then soak it in diluted hydrogen peroxide in a refrigerator until I need it.
One thing you could reuse coffee grinds is as a roach deterrent, Roaches hate coffee grinds and if you take your coffee grinds and place them in areas you see roaches congregate..they will find another place, It even can get rid of them all together. Reason I know this is I am anti pesticide and herbicide. There are so many natural alternatives to bug spray..and coffee grinds is one of them !! I think re-brewing coffee grinds is not a good idea, as the coffee produced will be of very poor quality