I've never been one for glitter, but I've always been one for coffee.
All you really need is clear polish and some coffee. Of course, I opted for Death Wish. It has the perfect shade that I'm looking for, plus it's pretty awesome to wear the world's strongest coffee on my nails.
I went with whole bean and crushed it up with the nail polish. You could use a grinder if you'd like a more consistent, smooth look.
I'd recommend starting with a base coat of a decently opaque color.
Just mix the grinds with clear polish.
Boom. Who needs glitter, anyway?