Jwolf wrote:If you're still progressing, you might not have to change much from what you did before to break 2:00 if you continue to run consistently. The jump down to 1:50 might take more work though.
I ran a 2:09 half my first time (in 2004) and a year later I was able to do 1:56. That was just from more consistent running, but I was still only running about 45k/week then on 4 days/week with a longest run of 21k. It took a lot more running (but still very little speed work) to get down to 1:51 two years later
This pretty much sums up my advice and experience. I didn't have to do a whole heck of a lot to get under two. My first half time was 2:28 (or something like that) and then, one year later, was 1:59. It was simply from running consistently. I didn't do anything fancy at all. Just keep on doing what you're doing if you are progressing, as JWolf says.
Also, regarding walk breaks, I do take them but not as often as every ten minutes. Perhaps every 30 or so, and just for a few seconds. La, when I ran my first marathon the people I ran with were scheduled to take a break 1k from the finish line. They INSISTED on taking it, while I wanted to keep going. It seemed odd to me to walk at that point, but they were VERY regimented and tied to that break...
I kind of figured that the RR plan was what it was, and that you're catering to a big group and not just me. I'm sure plenty of people like the challenge of trackwork. I really did enjoy the clinic, even if it was really tough and exhausting by the end. You know I greatly value your expertise and experience! 
