A journey of creating myself

Hello everyone, My name is Cassie. I am 20 years old. My height is: 5'5" My SW is 177. My GW is 140. I am hoping to reach that by July 2013. It will be my 21st birthday that year, and i really want to be able to wear a dress that i don't feel uncomfortable in. I have always been overweight, and struggled with gathering the motivation to get it off.
I moved out on my own a year ago with my boyfriend, and have gained 10lbs since doing so. I've realized that it's time for me to start living a healthier lifestyle.
I started C25k. Finished W2D2 tonight.
I'm looking forward to talking with others and getting some tips on what has worked well for everyone here.