Amazon is appealing to early holiday shoppers with an October Prime Day. If you plan to travel this holiday season, an extra gadget or two in your carry-on could go a long way.As a full-time digital nomad, my life is a balancing act between working, traveling and exploring new places, and I’ve taken hundreds of flights over the last eight years. Checked bag drama can be unpredictable, so I like to pack my carry-on with essentials to make each trip smoother, more entertaining and more productive. These items are also a…