I saw something similar to this (might have been the same site, I don't recall) last year and decided to use the idea for my own, less far reaching plan. I wanted to have supplies for a little over a month and set about making specific purchases each week. I also wanted to have a certain amount of emergency cash on hand - so started putting away a certain amount (even a few dollars) earch week. This sounds exceeding simple - but saving for me and planning purchases over a period of time is a challenge for me. I'm very impulive. This worked out very well.