I'm not sure if that's likely to be achieved, but nice idea. I wonder what could be done other than completely restarting. I'm sure there are plenty of other things. Maybe something like a swear jar. Each time you have a negative thought you put an amount of money in a jar. At the end you'd donate it to charity or something. Or maybe you could say an inspirational quote to yourself each time you have a negative thought. Just some ideas.
I wanna do this, I've been way too obnoxiously positive lately. but I think it is hard to have no negative thoughts at all, sometimes they appear out of nowhere, but if you can make them positive then you can keep going onto the 10 days! good luck all!
I'm actually a pretty possitive person most of the time however I would find this difficult to do as I suffer from intrusive thoughts that I can't control, I mean I try to suppess them straight away afterwards (which I'm sure does more harm than good but what the heck) but yeah they're always negative and somewhat freaky.
Although I haven't been having as many as usual recently so... I may give it a go.