If you go to a restaurant and order a meal, you are automatically given the right to get as much salt as possible for free. However, just because it is free, you do not end up putting a lot of salt into your meal, as it will decrease its taste. Similarly, you should not do a lot of things just for the sake of your capabilities of doing them.
That salt might be seen as free of charge, but it is actually included in the price of the meal. When you put too much of it in the meal, it might not be delicious to eat. That is also the case with our actions and tasks that we do. Just because we are capable of engaging into forty different tasks a day does not mean that we should engage on that type of endeavor, if our purpose is being really good at what we do.
We should try to be both efficient and effective with our commitments; being effective means doing the right things and being efficient means doing the tasks well. Our day is comprised of twenty-four hours a day and there is an infinite pile of tasks that we could be doing during those hours. The ability of selecting some of these tasks and doing them well will make the difference in comparison to others.
Imagine the CEO and founder of Mark Zuckerberg during his early days while developing Facebook. If he would simultaneously start to also focus on making a search engine that would be a rival against Google, Facebook would not be where it is today. At least, not in its quality and the user base that it currently has.
Successful people focus on a few things and deliberately push their limits and as a consequence of this, they end up producing remarkable results. Therefore, before you start doing a task, ask yourself what would be the consequences of not doing it at all.