A couple days ago when I went to the gym I ran on the treadmill for .25 miles. Walked .5 miles. And repeated three times. Today, I biked 1 mile in 5 1/2 minutes. Running was another story. I intended to reach .25 miles and either walk or just stop after that but I realized I wasn't actually tired. So .25 turned into a half mile and again, I felt pretty good and didn't have the excuse of feeling drained so why stop there? One beautiful mile and a 15 minute timed run later, I finished todays workout.
I call that a job well done for today.