Here are a few healthy choice snacks to keep on hand:
celery stuffed with peanut butter
I make a huge pot of vegetable soup and have it on hand. It's easy (just pop in microwave) and very healthy.
Laughing Cow cheese w/whole wheat crackers
small bran muffin with cup of tea
100-calorie pack of cookies (if you can resist the temptation to eat the whole box :-) Whole wheat toast with smear of nut butter w/cup of tea
baby carrotts with Ranch dressing
ham slice on cracker
canned fruit w/tablespoon or two of cottage cheese
small corn tortilla with sprinkle of grated cheese, melted in microwave
Here are just a few suggestions. (I don't think anything is unhealthy if done in moderation, even cookies)
I hope this helps.