I have always just used soy or teriyaki sauce and some hot sauce. What do yall like beat for a Marinade/brine. Im going to try something new with my next batch.
You can always use the ready-made recipes from Sportsmans, Cabelas, etc. I've used them plus add additional ingredients available at the local grocery store's seasoning section. I marinade overnight plus also flake additional ingredients that I sprinkle on top and dab into the strips just prior to setting in the dehydrator. I often take ready-made seasonings and add them to the top and bottom with pepper and other ingredients. The sprinkled seasonings on top is an added touch that gives a lot more flavor in each bite!
You can buy a jar of pepper at your grocery store that has a mini-grinder. Montreal Steak Seasoning makes a couple seasonings that include garlic, peppers, papyrika that is pretty darn good!