Not a big sandwich fan, but I do take my lunch most days (except when I meet a friend for lunch - strictly social, not lazy
). Usually I pack leftovers the night before - one container for me and one for DH. Pasta dishes pack well, as do casseroles, or a piece of leftover meat and veggies/potatoes. We both have fridge and microwave access. When we don't have leftovers, I keep a few frozen meals on hand (bought at $1-$1.50 each at my discount - er, expired food - store, or Banquet or Michaelina). I also try to freeze individual bowls of soup or chili when we make a pot since I'm a soup snob and don't care for canned. If all else fails, I'll take some tuna fish and bread to make a sandwich or some rolled deli meat and cheese. DH keeps a case of raviolis in his car for emergency lunches (he works in an elementary school, so back-up lunches are cafeteria food - ick), or will take a salad in a pinch with tuna on top.
Since I'm pregnant and hungry every two hours, I have to pack snacks as well. It helps to do this the night before as I tend to be rushed (er, late) in the morning. Some ideas: fresh or canned fruit, yogurt, string cheese, deli meat and cheese rolled up with mustard, a muffin, English muffin with p.b., etc. I keep microwave popcorn, oatmeal, and breakfast bars at work, although my space is limited since I discovered a mouse had been visiting my food drawer. Ewww....