Basically, aren't you being challenged every day? Some days, the challenges are a bit more than others. Most of the time, it is about staying focused and staying on track. Accomplishing something, not merely existing.
I think we all need to recognize that each day provides us with choices. What work we want or have to do and how are we going to approach getting those things done. We can choose to just execute OR we can choose to execute with people that we want to be with, people that we believe in and people that we can count on.
Choose wisely.