Head Games On and Off the Track

Running is such a mind game. The first mile last night was fun and not bad. (Music does a lot, I've decided!) The second mile yesterday was hard for me, tortuous. My thoughts of "Oh, just stop at the next lap" warred with my determination to keep going. I'm pretty sure my plodding, mournful jogging didn't win any athletic-looking awards then, but I finished it!

What about you? Where do head games get worked into your life? I've been learning about the concept of living by the Spirit's power lately in Bible study. It seems that my initial decision to try to to choose the Spirit's response to a situation instead of my own is the first mind game. That's so hard often. I'm still pondering that though. Thoughts?