15. Willingness to Learn
If you came across this article and read all the way to the bottom, you likely already have this skill (nice!).
This is probably the most "general" skill on the list, but it's still necessary.
Those who don't seek to improve what they do, whether it's building products, marketing businesses, or helping customers, will get left behind by the people willing to invest in their skills.
We love how the BufferApp team approaches this skill with their wonderful monthly customer happiness updates.
The updates are public, detailed, and go through how the support team (and the team at large) handled incoming emails for the month.
What better way can a startup's support team learn as it goes then breaking down their own customer happiness metrics each and every month, for the public to see?