I've written a few articles on the global marketing subject before, this article includes a bit of repetition however it's aimed at a company with a prescense in 4 or more countries, that want to start out with digital marketing activities but feel unsure of where to start and where to invest and how to prioritize a large batch of markets.
These are my key take aways from helping global brands who has never done any digital marketing activities to more experiences brands, this advice is suitable for both B2B and B2C to manage global marketing activities.
One of the easiest and simples tools for planning activities and aligning a team (including the client in the team here if you work "agency side") is to make a roadmap. This creates focus, and puts the work in a context in terms of time needed as well as for example what other external agencies need to pitch in and deliver by when to get things done.
Meetings can be both stressful and the single most effective way to move a project to the next level. The earlier if you have too many meetings in a row without a clear purpose, the latter to work through challenges, that may be perceived as greater than they actually are while being discussed in epic emails back and forth.