Maintaining a car you don't drive often
What should be done to keep a car running well that you don't drive much? I have a car that I use for long road trips (which is roughly once a month) and is not my daily driver. I need a truck for my daily driver, which gets terrible fuel mileage and explains why I have the other car.
That said, I know cars are made to run -- not sit around. Seals, batteries, tires, hoses, etc. I'm sure are suffering when I don't use them. What should be done to keep it in good shape? Just start it once a week??