You are the center of your life, the master of your universe. You must change yourself first in order to affect the changes you want around you. This is always true no matter where you are.
If you face any given situation with calmness and clarity, you can make a fresh start. You can create new karma.
When the mind is swayed by negativity, your peace and wisdom are diminished. So, always keep your mind calm and observe each situation from the perspective of your innate wisdom. Be aware of your physical body. Be aware of your mood and the environment. Elevate your perspective, and nothing will be hidden from view.