Here is what I take:
8 Ibuprofen in a "button" ziplock
2 Benadryl in a "button" ziplock
2 Immodium in a "button" ziplock
1 Single use Neosporin pack
1 Alcohol Prep Pad
1 Single use Super Glue
1 Tincture of Tincture of Benzoin Ampule
3 Feet of Luekotape P wrapped around a section of drinking straw
1 Blister Bandage
1 Safety Pin
and a 4×6 heavy duty ziplock bag to store it all in. The whole kit weighs 0.7oz. The only thing that I ever use from it (knock on wood) are occasionally I will take a Ibuprofen or use some Luekotape.
I realize my kit is minimalist, but I can't imagine too many situations where something else packable would make much of a difference except perhaps a needle, dental floss, and some clotting agent.