Order and orient the keys on your keychain
The time spent getting into your home is nothing time.
It isn't travel, it doesn't enrich the soul, or broaden your horizons —and unlike other parts of your commute, it is too short to be used for learning or self-reflection.
Worse still, in an emergency, when you're at your most fumble-some, this time could be critical for putting out a fire.
That's why I've spent way too long thinking about the optimal arrangement of keys on a keychain, to reduce egress time to a minimum.
Most people probably don't need to unlock three doors to get into their home (my situation) but the same logic should apply to any configuration of keys.
1. Orient your keys so they all face in the direction of entry
Having all your keys face the same direction is critical.
If keys are oriented in different directions, you'll need to reorient them every time you use a different key to enter your home, wasting precious seconds that could be used stroking your dog.
Orienting your keys also allows us to order them further using the next two methods.
2. Order your keys clockwise based on the direction of entry.
For reasons that are not entirely clear (to me) people consider clockwise to be the default direction you turn something to use it.
Locks typically open clockwise and so it makes sense that our key ordering would go in the same direction.
Of course, if we flip our keychain after ordering them, then the keys will be ordered counter-clockwise. That's why we have to order them clockwise based on the direction of entry.
Once you enter the first key into a lock, you'll be able to swiftly move onto the next key without further fumbling.
Home, car, work scenario
Lets say you have one key for home, one for your car, and one for your work. How would you go about ordering them? You can still map them in order of use, just at a grander scale.
3. Use keychain trinkets as delimiters for the start and end of a set of keys
Now your keys are oriented and ordered, the last thing to do is to make sure you keychain trinkets are placed between the first and last key. That way, once you've oriented your keys correctly, you'll easily be able to find the first key. It will be the first key in a clockwise direction starting from your trinket.
In the scenario where you have more than one set of keys on your keychain — perhaps you're a groundskeeper or a housing enthusiast — you can place a joyful trinket between each set of keys.