Chi Running is a great book that I had forgotten about, thanks for the reminder. My advice is to forget about time and speed and just dial in to a comfortable pace and just go. I am not there yet but I have been there in the past. When you get to a point where you can lace up the shoes and hit the pavement for 30,40 or 60 minutes, then you can start to worry about pace. Until then, try to enjoy the process of getting it done. If you focus on speed before the endurance you are likely to get injured. Enjoy! Just finished week 2 day 1 and I can feel my "wind" coming back. It's not as easy yet as it once was but someday it will be.