The only other thing I can think of right now is to till up more land for the garden.
-Blast
That's easy, train some woodchucks to do it for you.
Amazing what you can grow as "potted" plants. I had a number of veggies and herbs growing in large pots this summer, when garden space was a premium. Weeding was almost not needed with the pots, almost plant and forget until harvest time. The pots required little watering in my area.