The BEST Key Organizer Is One You Can DIY for $5 

Dude loves high quality gear but he also adores function over form. This channel is definitely a hidden gem.

Hey, I was in the same boat as you, but I knew that they're also called book screws, which is harder to look for since chicago screw is a more common name. I finally found out their most known name by watching an Adam Savage's Tested video about it. I can highly recommend also checking out his favourite tool series, where one can learn the names of tools one has seen, but doesn't know the name of. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Sz4mxsYOwzQ.html Edit: attached the link to the video I'm referring to.

Same here. There is always one a little too small.

Now that's an idea! If I didn't rent, I would probably do the same or switch all the locks to smart locks.

I'd imagine I'd have to change the code every month in case the kids type it in next to their friends. Maybe when they're older and I have some money to spare.

You might also want to look at the Lucky Line Twisty key ring. I keep a couple on a titanium gate clip to attach things. Rather than make a separate post, I'll also note that I carry my keychain in a small leather pouch. I used to actually have one designed as a keychain, leather pouch, spring steel opening and attachment point, but it wore out. I have to check our new smart key, but the last one was kept in a small spark-lite box with a thick rubber band (from broccoli bunches) around it, to protect the necessarily expensive device and so the buttons would never get depressed accidentally. I never needed the buttons so they are better shut away. I have the new one in a small belt pouch from CountyComm...I suppose it it comes to that I can use that in my pocket or leather pouch. My front door house key is actually on a separate parachute cord key fob, which I try to keep in the same leather pouch. Does anyone know of a front door smart lock that will actually work on a three point locking impact rated (hurricane) door? I have not found one that will lock the bolts at the bottom and top of the door. Most only seem to work the latch. We are getting a new double front door (French door) and it appears we will have to stick with a key operated lock/handle combination on the active door. At least on the new one, the inactive door bolts will also work from a the interior handle. On our rear French doors the active door bolts work from the handle but the inactive door had those little latches along the inside edge of the door. [I only mention this in a sort of warning as when we were looking at doors I was surprised to find a friend had doors which had latches on the active door that had to be manually activated from the inside. No thank you.]