Indoor Season Kickoff

I had originally planned on doing 2 24-week "seasons" per year (straight out of Daniel) but I now plan on 3 "seasons" per year: a July-Nov fall season, a Dec-Feb winter/indoor season, and a March-June spring season. After taking a week off after my mod-Nov 5k I did an easy 50% week (12 miles over 4 sessions) and I'm now in the midst of an easy 75% week. I started with one hour on the treadmill Sunday (6.7 miles) and a 20-minute treadmill recovery jog on Monday. Tuesday I had planned on an easy 4 miles on the treadmill but my pulse was way too high so I cut it back to another 20-minute recovery jog. A lot of coughing going on at home so maybe I'm on the verge of something. I'll likely skip running the next two days and try for an easy 4-miler again on Friday.