I just recently started on my first aid kit. I have been studying all the commercial kits and cooking up my own version. I had extensive first aid training years ago, but my old foggy mind has trouble remembering. Hopefully if I ever need to help myself or some one else it will all come back to me -

lets see -- was it tilt the head back and then check for obstructions, or....
maybe it was check for obstructions, then tilt the head back....oh yeah and pinch the nose closed before blowing....oh wait I should have started the CPR compressions first...okay lets start over.....
(meanwhile victim turns blue)

I did add one thing this year - I can't get iodine anymore thanks to the meth labs, so I put betadine in a 1 ounce visine bottle. This can be used to irrigate and/or could be applied to gauze -- it would be nice to be able to carry more, but I settled on 1 oz.