This seems like a good idea. Except for some of the designer door latch sets, I don't see much of a problem.

I like this idea. Perhaps you could magnatize the inside of the lock to pull the key inward.

I just checked. All of mine are inset. Not that it matters. We don't lock the handles anyway. We use the deadbolts.

This is what makes an already Good lock go to Great.

This sounds like a good idea. Of course, you can't make it too funnel shaped or it will be too deep. Then you wouldn't be able to get the key all the way into the lock without making the key inconveniently long. Someone suggested a magnetic key hole, but this wouldn't work because keys are almost always made of brass, which is not magnetic. They don't make iron or steel keys because it would be too hard to grind into shape by the locksmith.

It's pretty typical to have a very small funnel around the keyhole, but a larger one would risk getting things other than keys jammed in there.

Even better, have a light that turns on when it's grounded. You touching the metal key, which touches the lock plate would turn on a tiny LED light from within.

stop drinking

get a fingerprint scanning deadbolt. no keys, no worries

Kryptonite makes bike lock keys with tiny LEDs in them to help you find the bike lock's keyway. Of course, bike locks are a real challenge since, unlike your front door, they're not fixed in one place.

I used to have a 1993 Ford Taurus that turned on all the interior lights by pulling on the locker driver's door handle. This gave you enough light to find your key and put it in the keyhole. (This, of course, has been superseded by remote controls on all but basic cars.)

If it is your house, get a porch light.If it is your car, get keyless entry. It can be had for less than fifty dollars nowadays.

Usually if something is locked up it is for security purposes. Why would you not light up the thing you are wanting to be protected? If someone wants to tamper with the lock, a dark place is better than a lit one, right?