Check out these articles: 

1. Bill Gates Says These 5 Traits Guarantee Success

http://www.inc.com/minda-zetlin/5-success-mindsets-bill-gates-wants-you-to-learn.html?cid=sf0100

2. The most important, yet overlooked management skill

https://getlighthouse.com/blog/management-skill

3. A Navy SEAL’s Secret for Pushing Yourself Way Beyond Your (Supposed) Limits

http://www.inc.com/jessica-stillman/a-navy-seal-s-secret-for-pushing-yourself-way-beyond-your-supposed-limits.html?cid=sf01001&sr_share=twitter

4. 5 Ways Learning Sales Can Help You Reach Success

http://addicted2success.com/success-advice/5-ways-learning-sales-can-help-you-reach-success/