Eat things that have a bit of a protein punch...and a little fat in them, too...or choose something high in fiber. The fiber/protein/healthy fats combo will keep you full longer and will help to keep your blood sugar level more steady, preventing "snack attack". Nuts are great, in moderation (lots of fat, though they are good fats). If you are not vegan, cheese is good. String cheese comes individually wrapped, so it's convenient. Fresh, crisp celery is great...w/peanut butter...or hummus (Ground chickpeas. It comes in all sorts of great flavors!). Whatever you do, avoid snacks that are purely carbohydrate!