I'm a grazer too, that's why I don't like buffet places.
it's just not worth the money for the amount of food I can eat, not to mention the quality of steam table food.
I love my "leftover boxes" of entrees of moo-shi pork or spicy da-chin chicken from a good Chinese restaurant. I've got a snack for later and a couple of lunches.
I'm 45, and despite the eventual sag brought on by gravity (d'oh) I can still fit into a size 4 or 6. Nightly walks help too, post dinner. Our dogs wouldn't have it any other way, and believe me, that's not easy in Minnesota when it's below zero. Routine is key.
I love buffets. I never get my money's worth, but I do like to have a bite or two of everything. I really like Brunch buffets, where I can eat fake eggs, bacon, potatoes, chipped beef, fruit and desserts. It's expensive for what I eat, but I love the stuff.
I get my moo-shi as carry-out. Double pancakes, and double sauce. Keeps me happy for at least two days. :-)
I really think that portion size is the secret to healthy weight. Buffets don't help.