When I start a new project I buy a whole lot of books but then find I don't want/need them. I don't quite know how I would know whether I od or not before I buy them and see which are useful and which are not?

I do buy a few too many that I don't think I will read but wish I would. I buy other things that I wish I would use/liked/wanted so my fantasy self gets in there a lot buying stuff. Food, too, I waste too much. I'll buy more vegetables than a family of 4 can eat in a week just for me, "in case".