However it does get somewhat more complicated especially when looking into different Industries, the role and responsibilities of a strategist and senior management goals (a focus on strategic planning and execution or increasing shareholder value etc).
The Boston Consultancy Group published this paper to provide an Understanding of the Role of the Chief Strategy Officer. It's pretty good and gets into the nitty gritty of the general tasks and responsibilities of the CSO.
What's really interesting about the article is the analysis they conducted to understand why some CSO's are more effective than other's. Their conclusion, effective CSO's have:
1. Clearly Defined Roles
2. They get the basics right around planning, growth and innovation.
3. They build credibility and trust (esp in the first 100 days)
Here is a nice diagram from an interview with 48 CSO's and their main responsibilities.
See Dan Ariely discuss this here:
Good listening skills are necessary - You need to shut up and listen! Then act.