I like to focus on core product strategy and go-to-market. To that end I am very critical of the team's efforts early on, especially when deciding which problems are worth solving.
On the execution side, most of what I like to do is focus on organization design and recruiting.
I have many relationships across enterprises and technology companies, mostly with product and technologists (CTO/Architects) and not as much necessarily the buyers (CEO/CIO). I look to make introductions for companies to understand whether their approach is valid, and not for the sake of a transaction.
I try to ask critical questions and prefer to put the decision back to the team.