Yep, its part of being prepared. I have 3 first aid kits ready to go; 1 in my vehicle, 1 in my home, and a third I can take with me should I feel the need. I also have a small, light-weight kit I take along while hiking and the like, though I've been meaning to find a better case for it and redo the contents.
I am of the belief that everyone, especially those who carry a firearm, should be trained in some form of aid. It never hurts to be prepared, and it doesn't take much to learn. A few hours spent can go a long way in the event of any type of incident or accident.
I'm certified in First Aid and Basic Life Support, and have plans to upgrade to my ACLS whenever my time and their class schedules allow.
“There are three reasons to own a gun. To protect yourself and your family, to hunt dangerous and delicious animals, and to keep the King of England out of your face.” - Krusty the Clown