One FAK at home to deal with basic everyday emergencies placed strategically in a kitchen drawer. Includes the meds my family and I might be required to use on a more or less regular basis.

One FAK in the car. Much the same, with some extra emphasis on dealing with trauma and injuries that might be expected in a car crash obviously.

One compact travel kit, pretty much the same but packed in a small handy bag that I can take along on vacation if need be.

Then there is the FAK in my BOB. A bit bigger than the travel kit, well stocked with supplies that should suffice for anything from a small cut to dealing with a pretty serious injury, including basic surgery w/ sutures etc. This is also the FAK that I carry on any prolonged hike or travels in remote regions.

Another item at least as valuable as a FAK is hands-on knowledge. Practical literature also helps a lot. I keep a copy of the Special Forces Medical Handbook close by, it's a really useful reference tool and helps diagnose medical problems pretty accurately if you have at least some sort of solid training and real-world experience to begin with.