I've been using this marinade from Six Sisters Stuff for a while now - it is easy to throw together and packs great flavor. I love to make the whole batch and divide it up among ziplock bags with fresh steaks and toss it in the freezer for a quick future meal prep.
Sizzlin' Steak Marinade
Recipe adapted from Six Sisters Stuff
1 1/2 c. olive oil
1/4 c. worchestershire sauce
1 tsp. pepper
1/2 c. apple cider vinegar
3/4 c. soy sauce
2 Tbsp. dry mustard
1/3 c. lemon juice
Mix all ingredients together and pour over steak. Store in fridge for 8-24 hours.
Grill and eat!
Marinade should cover about 4 lbs. of steak (or more).