Going Deeper Down the Heart Rate Monitor Training Path

Yesterday was day 4 of training with the heart rate monitor. Another day another target HR I was trying to maintain. Based on my 175 max HR and 64 resting HR, I was trying to stay in the 70-80% Aerobic zone as computed by Buckeye Outdoors. The 70-80% gave me rates between 142 and 153 that I was trying to stay within. Reviewing my results, it looks like I was in that zone for 68% of the run. I ran early in the morning before work and went for around 7 miles. I found that after 6 miles I started exceeding the 153 rate mainly because I would zone out and forget to focus on running at a slower pace. I also found that it takes longer to return back to the lower zones the longer the run. My average pace, which I didn't pay attention to while I was running, ended up being almost a minute slower than the pace I've been running my weekday runs.
Last night I got the first book that I ordered on HR training, Heart Monitor Training for the Compleat Idiot. I read the first few chapters last night and could already relate even with just 4 training runs with the monitor so far. The book contains training plans that I haven't gotten to yet but may end up using in the next couple of months leading up to my next half marathon. They are based on alternating hard/easy days.
I also learned that my resting heart rate is not 64 but more like 45. I was using 64 based on the latest pulse I had when checking my blood pressure a week or so ago. The correct way to determine resting heart rate is to check it first thing in the morning before getting out of bed. Based on a 45 resting HR, my aerobic zone of 142-153 that I was aiming for yesterday really should have been 136-149.
So I am still very much in the tweeking stages of this HR monitor training. I am now focusing on not exceeding my Recovery Ceiling of 136 on my easy days and targeting 155 as my Threshold Floor on hard days. Those 2 numbers constitute 95% of HR monitor training according to Mr. Parker.