SmartCoach

After searching the internet for a training program, I finally decided on a customized plan from Runner's World SmartCoach.  What I liked about this program over others is that it's based on information that I provide rather than being some standard plan.  I input my pace from my last 5k, the date of my half marathon, which day of the week I want to do my long runs, etc.  The results were a 19 week program that started on Sunday, Dec 18 and goes to race day.  The first several weeks only have me running 3 days/week.  That will allow me some day-to-day flexibility in the schedule, which is good since who knows what the winter weather will be like over the next few weeks.  As I get closer to my half marathon, I will start running 4 days/week.

There's also a SmartCoach iPhone app that I looked at, but I went with the plan on the website.  The iPhone app looks good, but there's not as many ways to customize the plan on it.  Also, the plans on the iPhone app only go out a max of 16 weeks.  Both the web tool and iPhone app are free, but you can choose to upgrade (for a fee) to get even more customization features.  I'll stick with the free tool for now.