I saw this link off of a design website and thought it was an amazingly great idea: Wheel of Nutrition
Basically it's plates that are color coded so you can see things like, fill up this much of your plate with veggies, this much with grains, etc. I don't know if there is an actual product they're selling yet or if it's just a concept, but it sure looks like a good idea!
I had plates like that for my girls when they were little, but for a different reason - they hated when their foods would touch and mix together with one another.
It's an interesting concept - but even in the pictures, they don't show a "normal" meal being used on the plate. Chocolate? Salad with strawberries? A piece of bread - a whole honkin' tomato? Where's the protein? If the people that designed it can't even come up with a real-life example...
Mentally, I do the quarter method all the time (1/2 veggies, 1/4 protein, 1/4 healthy starch).
Technique I learned in WW that I really liked (and especially effective at holiday dinners or BBQs) - place the salad-size plate or bread plate or bowl in the middle of the dinner plate and stuff it full of salad, and then put the other stuff around the space remaining on the dinner plate's rim - managing the quantity and size of those portions so that they don't touch each other.