I really want to do a No Spend Day challenge, a la Money Saving Expert. All very simple - you just take a calendar month and choose how many days you won't buy anything that month. And then post about it on an online forum, obvs 
I've been looking at the NSD people on MSE and they're bloody mental. Also, I'm a lot more comfy here in MN.
So, someone, please join me? I need to stop spending money like it's going our of fashion. I'm a real dick when it comes to money.