If you are quitting a vice (smoking, drinking, etc.) treat yourself with the money you are saving. It makes quitting easier
If I had back all the money I’ve spent on alcohol over the last year, it’d probably be somewhere around 30% of my net income. I’ve decided to get my shit sorted, and I’m 9 days off it. The rest of the year, any beer money I have is going into a “get a new hobby” fund. Thinking about mountain biking or hiking. A sober Christmas will be a nice cap to the year I’ll always remember as being my worst.