Wedding in March!

I'm getting married near the end of March and want to look the best for my big day. I normally fluctuate between 155 in the summer and 170 in the winter.. but since March is the better time for everyone to show up for the wedding i'm getting married in March and I'd rather be on the slimmer side earlier than later. I'm currently 169 and i'd like to be about 155 by March 21st. That gives me 8weeks to slim down, so any help or encouragement welcome!