ok..you might think this is strange but whenever I eat turkey, chicken or ham sandwiches, I spread on a thin layer of jellied cranberry sauce on the bread..it gives my sandwich a nice tangy zip.
Another condiment I use regularly is SF raspberry jam. If you've ever eaten a deep fried monte cristo sandwich in a restaurant, they always serve them with raspberry jam so i decided to try it at home on a cold sandwich and its delicious! Try it, you wont be disappointed!