Portion control will help, but join challenges that'll keep you on track.
I've joined Challenges for the month of December. Not on sparkpeople, but with my friends.
1. Only go to a party/out to dinner/or have a cheat day one day a week. Doesn't sound like much but there are holiday parties all the time lol.
2. I'm doing Walking Lunges Challenge. Day 1 do 5 walking lunges/leg and every day after that add 5 more. Today I'm on 50 walking lunges per leg.
3. I'm doing a challenge that requires exercise 5 days/week for a minimum of 30 minutes.
Challenges hold me accountable and I've found it still helps me lose weight during the holidays.