Compass adjusted for magnetic declination, map of area, GPS (create car waypoint), extra batteries for GPS, whistle, LED headlamp, extra batteries for headlamp, something bright for daytime signals (bag, bandana, coat, ...), signal mirror, liter Nalgene bottle, and maybe controversial, but I like a Steripen with extra batteries (fast, easy, safe). Bandanas are also useful for soaking up water/dew, first aid, and pre-filtering water.

Consider a personal locator beacon.

As you may have seen in my past posts, I think GPSs provide an amazing ability to get you unlost IF key waypoints are saved. A compass saves battery life, avoids confusion, and are useful & with maps.

Honestly, if you can buy one, Doug's survival kit is excellent and cost effective for those elements. I tend to recommend buying two, practising with the contents of one, and packing the other.

I cut my paracord into 15-20 foot lengths to be more manageable and wrap them into fist sized bundles. Easy to tie them together, as needed.