Excerpts:
1) Availability
We often settle for what’s available, and what’s available isn’t always great. “Because it was there,†is an okay reason to climb a mountain, but not a very good reason to take a job or a free sample at the supermarket.
2) Ignorance
If we don’t know how to make something great, we simply won’t. If we don’t know that greatness is possible, we won’t bother attempting it. All too often, we literally do not know any better than good enough.
3) Committees
Nothing destroys a good idea faster than a mandatory consensus. The lowest common denominator is never a high standard.
4) Comfort
Why pursue greatness when you’ve already got 324 channels and a recliner? Pass the dip and forget about your grand designs.
5) Momentum
If you’ve been doing what you’re doing for years and it’s not-so-great, you are in a rut. Many people refer to these ruts as careers.
6) Passivity
There’s a difference between being agreeable and agreeing to everything. Trust the little internal voice that tells you, “this is a bad idea.â€
http://www.forbes.com/sites/jessicahagy/2012/02/28/the-six-enemies-of-greatness-and-happiness/