Worked:
Garmin InReach Mini -- a great way to stay in touch, and keep peace of mind for everyone (it was great for my wife to know I was still alive, and for me to know everything was OK at home.) Such a solid little piece of gear. Hope to never use the SOS feature, but damn glad I have it just in case.
Easton FMJ 'retro pattern' arrows - heavy duty, great penetration, durable. An antelope buck didn't care for them much....
Darn Tough socks - I went with the Mountaineer version, and it was comfy, no hot spots, and kept my feet warm down to about 10° with stop and go hunting. I use them for all hunts (different weights), and love them.
12x50 binos - either on the tripod or handheld, the extra magnification was beneficial in all glassing sessions.
Crispi Thor boots - comfy, sturdy, light enough to wear on almost all hunts, but still used them during a cold November mule deer hunt. The primarily synthetic construction didn't retain moisture, and the stiff shank made side-hilling and off trail uphills easier.
OnX Maps on phone - been using this for a while now, but the new features and just more familiarity made it indispensable during the season. Also used it to find a new area that is very promising for mule deer.
Hornady 143 grain ELD-X bullets - very large spring bear taken...great round.
New for 2019 pack from MYSTERY RANCH......45 liters, Overload shelf plus a few very cool new design updates....stay tuned on this one!
What didn't work:
Lorpen socks - developed hotspots and underfoot bunching. No good for me.
The elk rut was a bit odd this year, but that is not something that is controllable; just need to hunt differently to overcome it....didn't happen for me this year.