Red meat is traditionally a protein that diets urge you to avoid. And it's sort of true that you can eat whatever you want as long as it's within your points while on Weight Watchers (I don't necessarily agree with that, though), but as the veterans know and the newbies soon find out -- points aren't created equal and you don't necessarily want to spend a gazillion and half points on a giant strip steak.
Flank steak is a good if want a more point-friendly option. For 3 oz. of cooked meat, it's 180/9/0 as opposed to a NY strip steak that can run 680 calories for one steak. The things to remember about flank steak -- if served rare, it's impossibly chewy, and if it's not cut on the diagonal or overcooked, it's impossibly tough.
But when done right, it's great. And Cooking Light's Broiled Flank Steak with Warm Tomato Topping is a good example. It's broiled, and the tomato topping is made on the stove top, so it comes together easily and tastes fresh. I served it with whole wheat couscous.