I am able to complete complex assignments in a very short time.

Speed at complex work is almost always purchased earlier, in slowness. The pianist who sight-reads a difficult piece spent years on scales that nobody applauded.

That is the uncomfortable part of this affirmation. It describes an outcome and hides the ordinary hours that made the outcome available.

There is one shortcut, though not the popular one. Most of what makes a complex task slow is that it is undefined. An hour spent breaking it into named pieces routinely saves four.

Before racing at something today, spend twenty minutes deciding exactly what it consists of.