Supplement your new supply of Woot!-begotten first aid kits with something they should really have anyway... QuikClot. This stuff can easily save your (or someone else's) life.
Unlike most products which have a warning about their limited efficacy on the package, this stuff actually says "Stops moderate to SEVERE bleeding fast." (I added the caps.) On top of that, it works. It was developed on a DARPA grant for treating battlefield wounds, and it is wickedly effective. If you have a strong stomach you can watch it being tested on pigs on youtube.
This stuff rarely goes on sale, and it's pricey enough most people don't want bother with it normally. Stock up now. :)
(I am in no way compensated for being so rabid a fan of this stuff. Seriously though, how many things can single-handedly save your life? There aren't many.)
Oh, it's also ShopRunner elligible.