Most of our family meals are dairy free and our staples are:
Spag Bol / meatballs / chilli con carne
Casseroles, often in the slow cooker
Pies, similar to what Trixy mentioned
Roast dinners
Chicken skewers with various marinades, lemon, garlic and olive oil is a good one.
Pasta with tomato sauces, or Sacla's Aubergine Pesto, which is d/f.
Stir fry's
Chinese food is better than indian.
Cheap biscuits are often dairy free, as are jaffa cakes.
Bake cakes with Stock that comes in a block, not the one in a tub.
Sorbets are a good bet for pudding.
My twins are off dairy, egg, soya and nuts, so it's a bit more complicated, but dairy free really isn't that bad, once you get used to it. Have a look on the allergy boards, there's some great ideas there.