Overspending protocol – lp

I’m in the process of finding a second part time job and it’s possibly going to be in retail. I have a tendency to overspend and so I think it’ll be a great opportunity for me to watch and manage my mind in an environment which can stir up a lot of desire. I want to create a protocol so that I don’t make my debt situation worse, buying things I don’t need. I’ve already decided that I would wait 24 hours before buying anything but I wondered what else I could do to create a protocol for overspending.