An excerpt from the article "Ten Ways to a New You" by Steve Edwards
Use a target goal that's qualitative, not quantitative.
Our society loves numbers. Losing X amount of pounds, running X amount of miles, going X number of days without smoking — these are things we dangle in front of ourselves as if they were some Holy Grail. In fact, these things have very little impact, if any, on what we really want, which is to improve our lives. Numbers can be great motivators. They can be nice as signposts on your road to progress. But they can also mislead you and shouldn't be a part of your ultimate goal, because you can't really control them. Shooting for unattainable numbers is one primary way we can sabotage our self-improvement goals.
The adage "It's not whether you win or lose, but how you play the game" isn't just about sports. Live your life well, and in the end, you'll be content, no matter where the numbers fall.