cut your jerky strips against the grain, cut them thin, no thicker than 1/8 inch.
make sure your meat is lean, for making jerkey you want as lass fat as possible. fat will not dry out at the same rate of the rest of the meat and will stay chewy.
marinate overnight with soy sauce and any additional flavoring you like, the longer it will be in the marinade the saltier it will be, i find that about 12 to 24 hours is good.
i like a marinade of soy, about 1 cup, brown sugar about 1/2 cup, cayenne pepper 1 teaspoon, 1 teaspoon garlic powder, grated onion( shed those tears) or dried onion flakes.
1 teaspoon black pepper.
you will find ways to consistently play and improve your jerky marinade each time you make it....its an ongoing fun and tasty learning curve
place in dehydrator and rotate the trays around every few hours.