As requested by Mr. Airfoils here is the recipe for the flank steak marinade I use. It is excellent when doing a whole flank steak or making the sates. However, if you are making the sates I would suggest you slice the steak then marinate.
2/3 cup olive or vegetable oil ( Iprefer olive oil)
1/4 cup lemon juice
2 tabelspoons cider or red wine vinegar
1 tablespoon Worcestershire sauce
1 tablespoon soy sauce
1 tablesponn Dijon mustardour
1 teaspoon dries basil
1/2 teaspoon dried oregano
1/4 teaspoon dried thyme
In a large resealable bag or non-reactive bowl mix all ingredients. I usually use a large Ziploc bag then add the flank steak, seal it, then let it marinate for 8 - 24 hours.
Grill your steak how you like it.