I learned to eat them (along with a lot of other stuff I'd never heard of) in the college cafeteria, of all places. Now they're one of my favorites.

Others have posted with good suggestions... I like to steam them, or sometimes cook them in a little water with chicken stock, a squirt of olive oil, a pinch of brown sugar and about a capful of cider vinegar, and a couple slabs of BACON!

I didn't like spinach at all either, until I learned that the derned stuff didn't always have to be boiled down like turnip greens... Now it's one of my other favorites, (as long as it's not boiled ;-) )