At my age and state of decay, a decent first aid kit is really not an option, but a necessity. Furthermore, if you are going out on the trail, as any old Scout will tell you, a first aid kit of some sort is an absolute must. You cannot get the most out of the outdoors if you spend all your time concerned about how you are going to preserve yourself, so a first aid kit really contributes to your appreciation of the country!
As I mentioned some months ago, I have been shopping for a first aid kit. I am looking, of course, for one that will not take up too much room in or contribute too much weight to my letterboxing kit. I have found some great products on line and in local stores that have really nice small cases, but do not offer what I am looking for in a kit, so I decided that it was time to go back to my Scouting roots and make my own.
One of the first pages that I stumbled upon when searching for personal first aid kit advice was on the Vermillion County, Illinois page. It is aimed specifically at Search and Rescue volunteers, and it has some fantastic pointers, and they have much of what I am looking for in a first aid kit: they are very compact and yet versatile. If you are interested, take a look at the site here. I am thinking of putting three or four of these together so I can have one in each car, one for the kit and one for long walks in the country.