Here is what has worked for me in the past. This pace below is relevant for smaller teams/orgs. You can pace this out for larger teams/orgs as needed.
Goal: Establish credibility and define your goal and priorities
Goal: Start executing and define the plan
Goal: Validate your strategy/plan and start ramping to your peak efficiency level
Pro tips for near term impact (depends on your focus)
If the near term focus is internal, then understand your stakeholders biggest pain or need and put a plan in motion to address that (assuming you agree with it of course). But ensure all the key stakeholders agree on the biggest pain to solve first. For example if the biggest problem is the sales enablement mechanisms, then work on that, and do market research and positioning later.
If your internal stakeholders are not screaming, then you have the luxury to focus on the external market. And you can follow the classic PMM sequence of initiatives (as they tend to be sequential) - understand the business, gather insights (customer, market competitive), craft positioning and messaging, build sales content, drive/support sales enablement, and start evangelizing (social, AR, PR, marketing content). I also liked what Suyog shared during his AMA.