So the first step is to prepare the meat for marination. Before you begin, make sure everything you need is on the counter as looking for an ingredient or tool during the process will slow down the marination and thus cost you time. In order to prepare your meat lay it down on the kitchen counter and make sure that all the pieces are of equal thickness.
With that done, place the steak(s) in a deep pan and pour whatever sauce you are going to use to marinate over the steak. Make sure you pour it over the steak and not around it. The meat needs to absorb as much as possible.
While the meat soaks up the sauce, add any herbs or seasoning in a separate bowl and mix it altogether. Now hold the steak over the pan and using your hands rub the mixture over the steak. Rub it hard as you want the flavour to get into the meat as much as possible. Do this on both sides of the steak and place it back in the bowl.
Add salt and pepper in the same way you added the seasoning.
The best thing to do would be to leave the meat to soak in the sauce and the seasoning, as this would be the most traditional technique or if you want to marinate it faster, one can place the steaks, with the sauce and seasoning into a plastic bag and place it in the fridge.