One of the most important aspects of starting a running training program is to understand what level of effort is appropriate to both challenge yourself and keep yourself healthy.
You have two options for determining the appropriate training speed for your goals: Rate of Perceived Exertion or Pace Charts.
Rate of Perceived Exertion (RPE)
RPE is great for beginners or runners who don't own a GPS watch. Furthermore, RPE allows for daily variation in pace due to weather, body soreness, or energy levels. After reading the workout for the day, identify the paces that you will be hitting. Check the right column for these paces. The corresponding "effort level" will give you an idea of what this pace should feel like - both by number and by brief description.