People aren’t always proud of the things they aren’t doing. Yet, knowing that list is crucial for success.
It’s fairly easy to create a prioritized list, whether it’s tasks, projects or programs. The challenge is what on that list is not going to get done, ideally you have more ideas for things to do than you have capacity for (if you don’t that’s another problem), ranking might be hard, and balanced portfolio creation harder still, but determining what is not going to get done is crucial. Making that decision early and effectively will make you much more effective.