Startup Idea : Resolutions/Purposes Management Tool

You want to quit smoking? Commit to a new diet? commit to a month being vegan..? etc etc We have all made in our life many resolutions, promises and good purposes and what typically happens is that we immediately share them with friends and family looking for additional motivation and support. Support of those we love and other people is fundamental for managing to maintain a promise with ourself. I often think and imagine a website that allows users to upload a resolution challenge (say, quit smoking) in a similar way like one would upload a campaign on Kickstarter. The user than is incentivised to share his plan (with all the details, benefits and timeframe) within his community (social media) who are assumed will want to show their support through various rewards and digital interactions.