So you’re training for a half marathon eh? What are you using to track your progress or to give yourself goals? You are using your Android device for this, right?
RunKeeper is a great weight tracking tool that lets you use your mobile phone and the website to keep track of your fitness. There is a free standard app, and now, the PRO app is FREE for the month of January. (Sources say that you can pick it up a day or two early for free, also.)