Impact is the amount of effect or influence your actions have.

Some things simply have more impact than others. Often it is the thing with the most leverage, but sometimes it's even more simple than that.

You should always be asking yourself "is this the most impactful thing I can be doing right now?"

When you have found something Impactful to do, focus all your energy on doing it as well and as effectively as possible. This way you will be considered great at what you do.