Here are my top ten tips for how to do just that:

1. Think Ahead. Most of the trouble comes from waiting till you're in the middle of an emergency hunger situation before taking action (like being without food all afternoon and coming face to face with a convenient snack machine). A little planning goes a long way. If you know you're going to be stuck in a meeting, take along something you can eat quickly and discretely to keep your blood sugar from plummeting and your cravings at bay.

2. Lettuce is a great container. You can wrap some leftover chicken in a lettuce leaf and eat it in the car, or anywhere else a sandwich would work. Throw on some tomatoes, drizzle some olive oil and you've got a decent mini-meal. A couple of leaves of red-leaf lettuce make a great "wrap," and the contents are limited only by your imagination.

3. Find healthy food that travels well. Some suggestions: cottage cheese, yogurt, celery, peppers, carrots and apples. Throw some berries into a Tupperware container with some cottage cheese and nuts and take it in the car with you.

4. Make it the night before. (This is a corollary of "think ahead.") At my house, we sometimes cook a week's worth of sweet potatoes on a Sunday, and take them with us as snacks during the week. They're as portable as you can get, they taste great cold and are a veritable vitamin store.

5. Think unusual foods. Sally Fallon, the great exponent of traditional nourishing foods, says that the best "energy bar" is a homemade, nitrous-free, lean-meat sausage. If you can find a local butcher who still makes sausage like this, grab it.