I think that most PSk's have too many items, many of which are irrelevant to the typical survival situation. Most survival situations last from 3-5 days, and the main strategy should be to await rescue, assuming someone who cares knows of your whereabouts. Be prepared to administer life-saving first aid (stopping bleeding, etc.), and be able to signal your position. Food aqcuisition should not be a priority, and for me, is completely left out of my PSK, as I will not starve in 3 to 5 days, and I know I can find something edible (weeds, grubs, etc.) if I have to stave of a few hunger pangs.
The point being that a PSK is just that, not a wilderness living kit, or an ultralight camping kit. Be prepared with knowledge and ingenuity first, and leave the fishing kit and the machete and the raft making-supplies for the expedition kit.
Anyway, you should be getting the point that less is more! Be smart about what to include in your kit, but don't jeopardize your best tool, your brain, with an overwhelming assortment of stuff you won't need. A false sense of security can get you into more trouble than its worth.