Keeping a training log is a fantastic way to monitor progress and challenges along the way. I still have my training logs from when I started jogging (very slowly) and it is great to look back over them and remember the challenge/effort and sense of achievement I felt as I first ran 5 minutes non-stop.
As you improve your running, it is very easy to forget how hard it was to start out. In keeping a diary, you will always have evidence of the hard work you put into your training in the early days, and it will act as a motivator to you when you need that extra kick.
I have attached an Excel Training log with this email that you can use. Keep it on your desktop and update every day. Alternatively treat yourself to a nice new notebook to log your new running career.