The biggest boost you can give yourself at executive level is authenticity. Show up as you really are, speak from the heart, be consistently you every day. People recognise authenticity at a fundamental level. It changes how they hear you, and what they believe.
To do that you need deeply to understand what matters to you and the things that send you off course.
I’d say the best way to achieve that, although I’m biased, is to hire an exec coach.