Here's the favorite steak marinade at our house. It's kind of a teriyaki marinade, and we got it out of The Ultimate Grill Book, published by Sunset...
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In a bowl, stir together 2/3 cup soy sauce, 1/3 cup honey, 2 teaspoons grated fresh ginger, 3 tablespoons dry sherry, 1/2 cup salad oil, 1 clove garlic (minced or pressed), and 1/2 cup thinly sliced green onions (including tops). Makes 1 3/4 cups.
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We've made it with and without the sherry; it's good either way, but I substitute some other liquid if I skip the sherry (usually by increasing the soy sauce or adding a little water). We've also substituted 'regular' yellow onions for the green, and it's a little stronger but still tastes great.