Ah, school lunches... No, I'm not strapped for ideas yet - it's only been two days! I am always open to hear what others are packing, though, so if you want to leave a comment with your great ideas, we'd all love to hear it.
Or do you have guidelines you want to share? I go with a main (often supper leftovers or a sandwich), fruit, vegetable, dairy (cheese string or yogurt), and usually one other (crackers, granola bar, rice krispy cake). I don't often send a drink, because they've got a water fountain handy (she keeps a water bottle at school to fill up), but once in a while I'll throw in a juice box or a crystal light or iced tea infusion to add some variety.
Do you send notes? I found some Printable Lunch Box Jokes you can send for a laugh. A little note tucked in a lunch is a wonderful treat to add some encouragement and a reminder of you in the middle of the day. One day this summer I was getting some food ready to take a lunch to work, and M packed it in my bag for me. Imagine my huge smile when I reached for some food and pulled out a scrap of paper with a happy face and "I love you, Mom" on it. It works both ways.