Our construction field inspector at work had to have hernia surgery. That means I have to do his work while he's away. I put 57 hours in at work last week. Everyday I'd say to myself, "I need to go running when I get home. It's a beautiful day, and I feel great!" Then a couple of hours later I'd say, "Ow. My legs hurt. I've been walking all day. And these 10 hour days are killing me!" So, I didn't run for a few days.
Today there were no excuses. I had to get out. It was 39° out. That shoulda been an excuse, but then I remembered everybody else in the world. So I ran, and I felt great.