Consider all the times you’ve needed to go to the store for a single item that’s run out. This can be avoided by automating purchases and maintaining a buffer of reserves, so you’re never out of stock.
Understanding your “burn rate” for everyday essentials is useful. How long do your razors typically last? Perhaps you’ll subscribe to Harry’s, once you know. Having a process for personal inventory management (whether manual like a checklist, automated, or hybrid) is one great way to always be prepared and save time.
Source: Ben Meer