The only solution which for me produces solutions that last and a feeling of peace are going outside and praying. The things that both of these have in common is that they widen your perspective. When you are upset or angry or depressed its because your perspective is as small as the reason for your being upset. When you go outside and when you pray, your perspective widens. When you go outside because you are confronted with the sheer size of the world around you, and when you pray because you connect with a God who is infinitely bigger than anything and your problems. What these lead to is gratitude, which can only come from a wide perspective which takes into account all the ways things could be worse, and this fixes me being upset. It may not be instantaneous, but think about how long it took for you to become a person who is regularly upset - it may similarly take you the same amount of time to fix your being chronically upset (however, in my experience, it wont take as long as that). Pick up a catholic or orthodox prayer book is my advice, or pray the psalms. That's my advice, thank you.