I just spent money without considering that I don't need what I bought! It is too easy to spend money on Amazon. Now I didn't spend a lot, only $.99 for an e-book that won't take up room in my house. Therefore, I didn't put enough thought into it. It looked like an interesting book that I could learn something from, so I bought it. Then I went to YNAB to record my purchase and thought, "I didn't need this book. It is not essential that I have it. I was not supposed to buy it!"
I'm going to have to be very careful about looking at Kindle books on Amazon. I have my number in the system, so one click buys my books. If that continues to be a temptation, I may have to temporarily close that account.