The Wichita Public Library has a simple and clever type of positive reinforcement. When you checkout a book from the library, the receipt shows you how much you saved by using the library instead of buying the book. They also show your lifetime savings.
At the beginning of this year, I pledged to not buy anymore books and instead either read the ones I’d accumulated or else checkout others from the library. It was a bit of a bumpy start to change habits and adapt to loan periods and hold times for books, but now I’ve hit my groove. I do everything electronically. I use Libby to connect to my local library‘s catalog and once a book is available, I send it to my Kindle. I’ve read much more this year than in the several years preceding. It’s a super convenient and rewarding system, though a tally of my lifetime savings would be fun too!