1. iPhone. I was walking and paddling for months this year and it was my first time with a smartphone. It was an extremely useful tool. I used it as a camera, GPS, map, journal tool, phone, star chart, plant and bird ID book and more.
2. Multiple-way tie:
A. Zpack Hexamid Solo Tent. Awesome 9.3 oz shelter.
B. Marmot Hydrogen sleeping bag. Light, comfy, warm. Rated to 30 F. but I take it down to 10 degrees or below by layering. About 24 oz.
C. Darn Tough, 1/4 Sock, Cushion. About 2.4 oz. Tough, comfortable. My favorite hiking socks.
D. Caldera Keg cooking system. Lightweight, efficient, nests nicely.
3. Free time.