From an obscure date in October to whenever I accomplish my goal, I'm going to tally my miles walked or biked (for the purpose of exercise - walking hither and thither around the house doesn't count). My goal: 1,000 miles. Why? Because it's measurable. Nothing more, nothing less.
I have two younger sisters, and they are both more running-inclined. I wish I was, but I despise the activity. Maybe I'll fall into it one day after walking a few hundred miles, but for now, I'd rather walk, thanks. Anyway, one sister was getting frustrated because she was trying to make times and beat times and set personal bests, etc. The other sister said "I run to get the miles." That resonated with me.
"Huh, I should just exercise to add up miles and not worry about meeting set daily goals or times or calories. Just walk to add miles to my log (real or imaginary)."
I realize, or at least I hope, my tombstone will not read "Here lies Rebecca. She logged 1,000 miles," but I hope, barring any freak accidents, logging 1,000 miles will postpone the tombstone.