For the most part, you can just follow those online instructions. However, I would like to give my suggestions on the most commonly neglected process in making beef jerky, namely, marinating. The most important thing is to keep a close watch on when you make a beef jerky is the marinating time, because it will determine the degree of flavor of the meat. For mild flavor, marinade the cut beef in the refrigerator for no longer than 3 hours. Adjust the length of time depending on how you want your finished product to taste. Normally, you don’t want to exceed 6 hours even for the most flavorful meats.
I find using a zip lock bag is the best way to marinate. Just throw in all the marinating ingredients and spices into the bag with the meat, seal the bag, shake a little to make sure that the meat is evenly coated, then store the bag in the refrigerator.