Lighten up. (Your key chain) For your car's sake

Does your car key share a chain with a fistful of other keys? 

That’s a lot of weight hanging off the car key when it’s in the ignition. That weight, combined with the shock loading of the keys bouncing around while you're driving can wear out the tumblers inside the ignition switch, and eventually lead to ignition switch failure. 

To add years of service to your ignition switch, purchase a lightweight key chain that allows you to separate your ignition key from the others, and drive with only the ignition key in your ignition. 

If your ignition key “sticks” when you try to turn on the car, it’s a warning that your ignition switch is about to fail. Replace it before you get stranded.

Also consider losing some weight by having all the locks in your house put onto one key.  High Park Lock, can rekey your locks for the price of a service call.

If, for example, your back door lock will fit in your front door lock's keyway, (whether or not it turns and unlocks the cylinder) these two locks are said to be, On the same keyway," and can be rekeyed so one key will work both locks.

If the locks are of different keyways, one or the other cylinder can be replaced, inexpensively, with a cylinder that matches.

Are you carrying keys you rarely use?  Such as the key to the family cottage?  Put a copy in the glove box of your car instead, so that its there when you need it but not  weighing you down day to day.

And that safe deposit key, you use once every two or three years?  Put it in a drawer.  Banks can replace a lost safe deposit key, should you ever lose your key ring in the lake, but you won't like hearing how much the bank is going to charge you to do it.