For me, it's less about eating. Don't get me wrong, some carbs and/or a little something something a couple of hours before does me some good. BUT for me, the most important thing is getting a nice warm up before I hit the ice. Get the blood flowing, muscles moving, etc. I try to get to the rink at least 45 min before a game--idealy and hour. I do some stickhandling with a ball, and then I do some foot work, cariokas, a few lunges, jumping jacks anything that gets my feet moving, so I get a light sweat and can feel my heart pumping..
Five minutes of warm up on the ice is not enough for me. With that limited time, the engine is cold and definitely not ready to go.