Learning business strategy as a corporate executive is really the kind of skill best paralleled in certain forms of gaming - tabletop games with a lot of trade/barter mechanics, MMO guilds, and such: it's some combination of people knowledge, planning, negotiation, and internal controls and mechanism design.
What you're designing from the top of a large organization is a "machinery of people", and if you formulate all of the quantifiable stuff into a spreadsheet, it won't be a crystal ball, and it can bias you towards nonsensical "works in theory" decisions, but it will give you a sense of how to manage events proactively and leverage specific strengths instead of just reacting to crises. The spreadsheet's answers ultimately reflect the philosophy you bring to it, so a general study of philosophy(best done in a classroom dialogue) can pay off as well.
A last thing to check out would be Wardley mapping. This is a good brainstorming mechanism for getting a sense of the terrain and the dependencies in your industry.