Actually a pretty cool idea to take up,i think i will take up this challenge as well.
Do it, I have absolutely no debt and I plan on paying my house off in less than 8 years. I have cut every source of excessive expenditure and don't waste my money on "things". I am however going to France on holiday with my wife in August (2 weeks) and would rather spend my money there on experiences than stuff that collects dust. Yes and that saving up for the trip and paying cash for it not on credit!
Its all a mindset shift, but you can start anytime, start today. Many ppl appear to be "living the life" but they are doing it on credit. Don't give a crap that I still drive my Corsa lite when the car is super light on petrol, insurance is R250 odd a month and just needs the service when required. It has served me well the last 150 000kms. Don't care that I have one of the smallest cars in the parking lot (and I work in a finance company so I'm surrounded by BMWs, Mercs, Porsches) , every month I am smiling as all that additional cash goes straight into my bond!