Every 6 months or so I sell myself on the idea that I need to go to the gym more consistently (meaning "more than every 6 months", demanding of myself that I "find the time" which more accurately means "make the time"), so I pull together all of the gym-related paraphernalia, discovering once again I can't remember the combination to my lock.
So every 6 months I end up buying a new combination lock, promptly putting the combination hint sheet in a "safe place", and then forgetting it over the coming 6-months of gym downtime.
I wonder if you can buy combination locks in bulk.