A large part of the JSM is about improving at ‘doing’. However, the things you end up doing are up to you. This introduces a worry. What if you spend time on the wrong things - ones that never end up being useful, take more time and money than you expected, or have unforeseen negative impacts?
The thing is, if you get good enough at ‘doing’, then it doesn’t actually matter that much. If you can learn to devote yourself to things, work on them for hours every day, and make lots of effective progress quickly, then a few less useful ones won’t matter in the grand scheme of things. At that point, they’re just extra experience.
Some products of your work will be incredibly useful in life. But the magic of the skill of ‘doing’ is that the process is much more important than the goal here. If you made good systems and habits, worked effectively, balanced it with everything else in life… then that’s a success.