I will echo all of these thoughts:
Reliability is sometimes worth more than talent.
I heard a quote (from a comedian), that went:
Anyone can be great for one night. What’s really difficult is to be good every night.

Another thing I’d add is:
Understanding your business and your role in it
And if you don’t get it, ask your boss for details (or whoever files the TPS reports .
Some bosses won’t share, but a good employee has a basic understanding of how the money flows in their company. What are the scale of clients? Who’s paying the bills? What’s the overhead like? What is my work generating (am I part of the overhead)? Is the company making or losing money? What’s going to drive next month’s profits?

Lots of employees simply don’t understand these numbers (and some employers don’t share very much). Especially in small companies, good employees understand their role in the “cash flow chain”. Then they don’t complain about money or time off or whatever else.

A secret of being a boss: treat people fairly but not equally. This means making exceptions where warranted. Your high performers will appreciate this but the low performers won’t. So you’re rewarding the right people.

Being a great employee is easy. Make your bosses’ boss look good (i.e., help your boss look good to their boss). No surprises (much worse than bad news). Be different by doing what others don’t (e.g., learning to use the applications on your computer) or won’t (e.g., its “beneath them” to make photocopies). Be referrable, as Dan Sullivan defines. Be pleasant (so people want you around). Be someone you’d want to hire if you were the boss.