Something you like with real sugar in it (or honey, or whatever, just not splenda or equal) - any athlete's drink is extra good like recharge, gatorade, powerade, in a flavor you've tried before and like. Lemonade is good, tea with honey, whatever you like.
I wouldn't recommend apple or orange juice, so many people don't like those in labor for some reason.
If you like ice or really cold drinks, lay in some ice. And straws.
Bagels/Toast/Muffins are good for an easy HOT snack - it's nice to have something warm sometimes and it's good one-handed food while you're nursing. Plus butter, jelly, nut butter, cream cheese, whatever you like.
Fruit, Cheese, Chips, Crackers, Hard Boiled Eggs, Dried Fruits, Nuts, Carrots, what do YOU like to eat?
Honestly, if junk food hits the spot, go for that...it doesn't have to be healthy.