Saving for a downpayment

One of the recommendations I've read lately is to make saving for a downpayment automatic. In his The Automatic Millionaire Homeowner, David Bach says that having regular amounts taken out of your paycheck or checking accounts and put into an interest-bearing account makes it easier to save, in terms of both time and money. Makes sense, sounds elementary, really. I already have a home account started with ING Direct, one of the places he recommends, but haven't put much in yet, and haven't made it an automatic deduction from my checking account either. I think that will be one of my next steps.