Always remember who's naughty and who's nice. It's as much fun to give as it is to receive. Some days it's ok to feel a little chubby. Make your presents known. Always ask for a little bit more than what you really want.
Bright red can make anyone look good.
Wear a wide belt and no-one will notice how many pounds you've gained. If you only show up once a year, everyone will think you're very important. In years past, children have received bags of reindeer food as pre-Christmas gifts. They thoroughly enjoy sprinkling the food on the lawn on Christmas Eve night before they go to bed. Even if you're on the right track, you'll get run over if you just sit there.