I don't like to involve with my self development challenges, I get that it gives the compulsion that you should do that you are committed to but I don't like to involve money with friends and family because I believe those two are bad combo and it can ruin the relationship over some silly things. On the other I give rewards to myself when I meet the goals like something that I wanted to buy in a while and this is the moment that I buy for myself for accomplishing things.