I ran the four miles again, but I didn't have a lot of energy, and I didn't do any speed work. I did measure my pace during the last half-mile, and it was 12:08. I enjoyed the run.
I decided during my Monday run to start running tangents during my training run so I'll be doing it by habit and won't forget to do it during a race. Race courses are measured that way to insure that the specified distance is the shortest way one can run the course. I ran tangents on Monday and again today. I think in a few more runs, I'll have a habit of doing tangents.