Eat more fiber during the day and you wont have crazy cravings as often or again.

A healthy snack... PB & Banana on a whole grain or whole wheat bread.
Yogurt + Oats mixed.
Black beans and Chips/Cheese (somewhat high in sodium)
Hot Cereal
High Fiber cereal with milk or alternative.
I like Kiwi's myself but bannnas, oranges, apples etc are nice too.

For me it's buttermilk. I was raised on it, so I'm accustomed to it, but it ain't for everyone.

Usually a good low fat fruit flavored yogurt will do just as well. Watch the sugar content. The milk proteins and the enzymes in yogurt or buttermilk have a mildly sedative effect, and for those who aren't lactose intolerent, it is fairly easy on the digestion.

For those who are lactose intolerent, a bowl of seasoned rice or some toast might be enough.

I'm up late plenty of nights when I'm painting kid's books (often well into morning), and I notice any cravings that can't be sated by tea or warm milk tend to lean toward carbohydrates. So I try to choose healthy stuff, too.

Kashi cereal is a favorite. That stuff is so good, organic too. Popcorn is a good choice, especially since they make those nifty snack-size microwaveable packets now. Usually I make mine over the stove using olive oil, though, since my hubby isn't a big fan of microwaveable popcorn. If I'm really feeling fun, I'll throw together a small mix of popcorn, raisins or cranberries, and peanut butter chips or almonds.

If you're going to up late make sure you're still drinking plenty of water. Seriously. And take out your contacts early!

Water's good.

I like my "cajun" corn, especially if I am watching a movie with my wife. I add about a tablespoon of melted butter to popped corn, sprinkle a lot of cumin and cayenne pepper on it and add a little bit of vegetable salt. MMMM delicious! And filling.