1. It's not how far, it's not how fast,

It is that you ran at all that matters. My first lesson from running is to just get out. Some days a slog turns into a joy. Some days it stays a slog. Some days you can't keep yourself in, and those are the easy days, when you may just add the extra out-and-back because who wants to go home, anyway. But this lesson applies to the other days, which in my life represent about half, or even 55% of days. If the calendar says it's a running day, then run.