I still like peanut butter and jelly sandwiches. I've just updated mine a bit. Here's how I make 'em now:
I toast a couple of slices of good bakery sour dough bread. I smear one slice with high quality chunky, salted peanut butter. Then instead of the little kid's grape jelly, I use orange marmalade. I sprinkle some dried cranberries on top, and then just a bit of honey to temper down the bitterness of the marmalade and cranberries. Pop on the top slice and you're good to go.
Use good ingredients. For years I've enjoyed Dundee Orange Marmalade, the original orange marmalade made entirely of the bitter Seville Orange.
Buy some Dundee Orange Marmalade.