Walk to all the appointments to make the arrangements for said wedding, create and think over the guest list while walking on a treadmill. Tell your bridesmaids, they will help!
Don't attempt any crash diets. It's the worst way to go and you could end up feeling really sick before or on your wedding. Try implementing diet and exercise.
Start your weight loss plan as early as you can. Crash dieting is not really beneficial in the long run. Eat a well balanced diet and get plenty of exercise.