Bonus Q: how much do you warm up and cool down?
for me, all mileage is counted. if i'm jogging around in an indoor track venue or something where it's impossible to know how much i ran, i'll still record the time and estimate the distance.
on an "easy mileage" day, i do not warm up. the first mile will generally be the slowest of all miles and serves as the warmup.
i will warmup 1-3 miles before a workout. counted. my cooldowns are usually 1 mile or less. counted.