My favorite times on the Boardwalk are evening and early am before the crowds hit -- like 7. Check out the beer sampler at the Brewery. Flying Fish is a must. Get breakfast at the Bakery at least once while you're there. If you're a pin collector, check the cart each am. I missed a LE 500 because I didn't check at 9 one day. It was sold out by noon.
My best tip, though, is get REAL excited 'cause you're gonna have a great time!!