Your relationships will rarely be healthier than your self-esteem. - James Clear

But when we repeat 1 percent errors, day after day, by replicating poor decisions, duplicating tiny mistakes, and rationalizing little excuses, our small choices compound into toxic results. It’s the accumulation of many missteps — a 1 percent decline here and there — that eventually leads to a problem.

Optimism early, pessimism in the middle, optimism late.

Your starting position has to be somewhat optimistic or you'll talk yourself out of getting started. Believing in what you are about to do does not guarantee success, but a lack of belief can prevent it.

Once you've committed, pessimism becomes useful. Question things. Find holes in your plan. Hold yourself to a high standard and try to identify your mistaken beliefs before they become your misplaced actions.

After you've spent some time troubleshooting, it's back to optimism again. Nothing will ever be perfect, but you have to act anyway. Progress requires the courage to forge ahead despite the inevitable obstacles.

Train hard and focus on what you can control.