We keep a lot of munchies stuff on hand and most of it is healthy. Nuts and seeds, pepperoni sticks, cheese, good crackers like triskits and dry breads like melba toast. Good fruit cups, granola, protein bars and we will cut up celery and carrots and bag them up to grab and go.
In the summer we will throw most of the above out onto a tray during the weekend just to snack on while we are busy doing something else.
Truthfully I have to admit we also have a copious amount of unhealthy snacks laying around too, thing is we just don't seem to go for them as much.