Try it salty and simple:
A handful of mixed nuts
A cup of cottage cheese
A few slices of smoked ham or turkey (good stuff; avoid the deli meat)
Baby carrots and ranch dip
Snow peas and soy sauce

Try some of these combinations:
Smoked almonds and cheese cubes
Cheese toast
A whole wheat bagel, toasted, with low-fat cream cheese
Whole grain crackers and cheese slices
Celery sticks with peanut butter

Or whip up a quick treat:
Cheese quesadilla: fill a tortilla with shredded or sliced cheese; fold in half and cook in a skillet about 3 minutes on each side, or until cheese is melty; eat with salsa, if desired.
Fresh guacamole: peel and pit a fresh avocado; mash with a fork, then stir in a squeeze of lime juice and a little salt and pepper; eat with tortilla chips or pita chips.
Hard-boiled eggs: heat a saucepan of water to boiling; add eggs, cover, and cook on low for 12 minutes; remove from heat, drain, and rinse eggs in cool water; peel and eat with salt and pepper.
Tuna salad: mash up one of your hard-boiled eggs with a fork; drain a can of tuna; mix the egg, tuna, and 1 tablespoon of sour cream or mayo in a bowl; salt and pepper to taste; great on crackers or in pita bread. (Don't do more than one can of tuna a week.)
Bagel sandwich: toast a whole wheat bagel; spread with a thin layer of cream cheese, a little leftover meat (ham, shredded chicken, bacon) and your favorite condiments (pickles, sliced onion, what-have-you); top with a piece of lettuce.