I don't think there's a one size fits all here. If you don't go out of your comfort zone and "do more" you may never get a promotion because you're seen as average. But it's also true that if you work hard and constantly deliver you may still never get the promotion because you're seen as critical where you are.

You might be disappointed either way. Like any recipe, there are many ingredients needed to pull it off. Delivering results, solving your boss' or boss' boss problems, doing it visibly, having support from above, doing it at the right time, etc. all contribute.