Your second most important technical skill is Awareness.
Of yourself. Of what’s going on around you. With your colleagues. In the department. In the company. The industry, the world, politics, new technology, etc.
Again, not so much of a skill as a habit.
What I do know is that as you stay aware of how you and the world around you is changing, you stay ideally positioned to seize opportunities and avoid problems.
Techies tend to prize themselves on being just that, technically-minded.