I've been using some sort of ROAD iD product for over a decade. I currently use the Sidekick model on my Garmin watchband. Do yourself and your loved ones a favor and purchase (and wear) a ROAD iD. A great, practical, common sense safety investment.
Squirrel's Nut Butter is my go-to anti-chafe product.
Orange Mud Transition and Seat Wrap - This towel is very versatile. I keep one in the trunk of my car, and I always take one with me if I drive to an event, run, or ride. The zip-up hood feature which goes over the headrest on a car seat makes this super convenient, since you don't have to worry about the towel slipping down on the seat.
Indoor Training Set-Up:
AfterShokz Aeropex bone-conduction wireless headphones - I really appreciate that these don't go in or cover my ears, and that I am able to hear my surroundings while listening to music or podcasts. I routinely wear these while on training runs or while riding the indoor bike trainer. I do not use headphones when I run on the trails or participate in races. I also don't wear headphones when cycling outdoors.
Theragun Elite - Using this percussion massager after a hard workout or a long day makes my muscles feel a lot better. The travel case is compact and convenient. I initially questioned the usefulness of the Bluetooth and smartphone app, but I have found myself using the guided sessions in the app fairly regularly.
PEET Dryer - I use the Advantage PEET Heated Shoe and Boot Dryer, and I also use the Glove DryPorts attachment. I was introduced to PEET Dryer by a Scouting friend. It works great to dry out wet or sweaty gear. The glove attachment is multi-functional. After a bike ride, I'll rinse my helmet off in the shower and then sit it on top of the glove attachments. You can do the same thing with hats. A great investment to keep your gear dry and odor-free.