What makes us really, truly successful over the long term has a ton to do with our social interactions and the influence we do or don't have with other people.
To me, meditation is simply silencing or focusing the mind.
The first thing successful people do is view failure as a positive signal to success.
To inspire a singularity of focus, a challenge must be important to you and it must be something you feel you should do now in this moment. If it's trivial or not time-bound, you won't engage. So in selecting your next challenge in life, choose one that is meaningful and will demand your complete concentration.
We should not seek to tune out the realists' whines or taunts, as they may provide good instruction.
People who label themselves as 'realists' are usually accurate - they see to the real edge of what they know, understand, or believe. At best, these folks tend to be caring worriers.