for me I think I would start with the $52 and work down, I always atart out Gung Ho, and it seems to peter out...this way the less you have to put in, you'd still have the same amount at the end.... Effortless savings, take the 52 week money challenge! Play with numbers you get the idea.
How about this? I'm going to use this to save for a nest egg for my children, to help them each get a car. If I do it twice for each child they'll have about $2700... a nice downpayment. Only I'm doing it backwards - it'd be easier to come up with $52 in January than in December (when it's time to buy presents, etc.)