For most Americans, Thanksgiving marks the official start of the Holiday Feasting Season.  With the average Thanksgiving dinner weighing in at over 3,000 calories (most adults only need 1,500-2,000 calories per day), it’s no wonder most of us will roll into the New Year at least a few pounds heavier.  Holidays and weight gain don’t have to be synonymous, however, if you do some advance planning and make smart choices at the dinner table.