Not a compulsion issue, just a time-saver for me...I alphabetize my canned goods and spices. Then I can do a quick check to see what I'm out of or low on when I do my shopping list. Also, I always try to shop with a list if I need more than 5 things. With 5 things I can keep track and I know if I've forgotten anything (I have a finger left!). I also keep a list on the frig. As I use something up, I add it to my list.