Almost every day, you will face some sort of curve ball which will throw you off balance.
The key is to calm down. Usually these curve balls do not have dire consequences to your core goals. However, because they disrupt your schedule and planning, you may feel off balance and stressed.
How do you overcome this? Revisit your quarterly, monthly and weekly goals. Ask yourself: what is the one thing you can do now that has the highest leverage to lead you towards your goals? Then go ahead and focus on this one thing and execute around it.