The HappyMind team, with the support of SATELIT.ua and IPCopt.com.ua companies, has created a special online trainer for self-improvement of mental health for the military of the Armed Forces of Ukraine and civilians affected by Russian military aggression. If you have come to the HappyMind website, you are likely concerned about your mental health. And this is completely normal, as even before the war, 80% of the world’s population suffered from depression and stress. Even in developed countries like the United States and the United Kingdom, only 30% of population with psychological difficulties receive psychological help, while in developing countries the number is no more than 3%. Simple and at the same time highly effective exercises can significantly reduce the level of depression, stress, anxiety, burnout, intrusive thoughts, and sleep disturbances.