I don’t keep any keys on a key ring with my car key. The reason is that I hate keys dangling on my leg when I drive. I always just go into the house using the garage door and my garage door opener. That worked fine until my garage door opener stopped working one day and I couldn’t get in the house. After that little incident, I bought one of those locks that use a pin pad for the front door.
If you don’t want to go that extreme, the Keybrid may be the perfect solution. It’s a key blank that you can have carved at a hardware shop to work on just about any lock out there. The thing has a key ring built into the key so you can clip it to things and I assume you could clip other keys to it as well if you want.
Right now, you can only get them in silver but next year there will be gold, black, and pink Keybrids too. A single keybrid in SC1 or KW1 styles will cost you $8.99 or you can get both styles for $16.99 and cover 95% of the locks out there.
