a great all-around mop sauce consists of 1 cup dr. pepper, 2/3 cup LOW SODIUM soy sauce and 1/3 cup extra-virgin olive oil. if you're not into the olive oil thing, feel free to use a blander oil such as crisco salad or canola oil. be sure to whip this through a blender before each use (you can brush it on or put it in a spray bottole and spritz) in order to blend the oil into the mop.
this mop is very versatile and really seems to bring out some great flavors. as you use it, you will eventually want to improvise and/or shake it up a bit. for a florida-style mop, try orange juice or 7-up (or half a cup of each) instead of dr. pepper, or to enhance a beef BBQ, try tomato juice or worcestershire sauce rather than soy. ponzu or teriyaki rather than soy gives an interesting kick, especially with orange juice. the possibilities are endless, but the basic (dr. pepper/low-sodium soy/EVOO) is a combination that will be your "go-to" secret ingredient.