Lunches

Most of you probably don't know, but I only have a half an hour for lunch at work every day. So, of course, I need to bring a lunch with me every day.
Now, I like a good sandwich as much as the next person, my sandwiches are usually whole wheat bread, mustard, turkey breast and swiss cheese. Good eatin!
But man cannot live on sandwiches alone, and I am going to get tired of eating them pretty soon I imagine. So I am in need of creative lunch ideas. A lot of my co-workers bring frozen entrees, but I always worry about the calories in those things, not to mention the sodium.
So, if anyone has lunch ideas, let me know.