Another way to keep a maxi from looking sloppy (as discussed here) is to pair it with a structured top. In the colder months, a blazer could do wonders. In the absurd, 90-degree weather we've been having in the midwest this week, a light peplum tank works well.
This belt is one of my favorite pieces. I can't count the number of outfits I've worn where this belt was the showcase piece: the thing that pulled everything together. Most recently, you've seen it in my anniversary outfit, and last summer you saw it paired with a dress I made. But, you probably haven't seen these old lookbook.nu posts that feature it: here, here, and here.