Best bet is to just get right back in there! Start tracking what you've eaten today is a good step..
I seen this great article this week that I saved in my favorites and it's perfect for your post.
"25 Ways to Get Back on Track Today"
Here's the link: http://www.sparkpeople.com/resource/motivation_articles.asp?id=1062
When you want to succeed as bad as you want to breathe, then you will be successful.
Commitment means staying loyal to what you said you were going to do long after the mood you said it in has left you.
"To all the girls that think you're fat because you're not a size zero, you're the beautiful one; it's society who's ugly." -Marilyn Monroe