Usually nothing, but sometimes I do brown or maple sugar. Just dried corn in a dry skillet, brown, and sprinkle on the sugar while it's still hot. I use it as trail food, and I don't need extra salt what with the salt pork or jerk or bacon I'm carrying. BUT, if it's all that I am carrying, then I will add the sugar. I have a history of attracting ants and other critters when the sugar is on the corn, so I don't do it much in warmer months.
If I have the time, in cold weather I will boil it with some salt pork, and that is tasty and filling.
LD