Do this until you reach your goal. Hopefully by then you would have broken this very bad habit! Don’t make the prize too big or you will get discouraged. Today, CDs cost about $15. So if each day you succeed, it will take a month to reach the goal. That sounds reasonable.
This idea can be used for any thing that you want to “Letakein”!
Maybe we should do it together and report to each other like a buddy system? If you want, let me know!