Fail to plan? = Plan to fail
Ok, Lots of Good information here. I agree with the points raised that training is important. As long as the training organisation is reputable then enroll.
Remember the basics
Danger,
Airway
Breathing
Circulation.
This is the simple key to all first aid situations. Doing nothing is not an option.
http://www.cotswoldoutdoor.com/Cat/111298?Ref=116989 is a link to some simple but effective commercially available first aid kits. Select the size that suits you, throw out some of the kit and adapt what is left to what suits your experience and activity.
As for a military FFD get one, couple with a crepe bandage as has been suggested and keep this next to your FAK. and a foil space type blanket
All this should sit comfortably in the top flap of even the smallest daysac. (and in my opinion should stay there, you would not leave your knife behind would you? so why leave behind a means to help yourself and others?)
A means to summons help should be included which for the UK means a mobile telphone.
This should allow you to deal effectivly with most common problems.
Remember simply placing your hand over a wound for direct pressure could save a life.
Your aim here is to get the person to the professionals not to avoid a trip to the local A&E.
Gavin