The article presents a description of the theoretical analysis results and a comparative empirical study of the Ukrainian students’ psychological well-being experience in modern conditions of uncertainty. In general, it was found that, despite the statistically significant differences between the assessments of individual items on the Riff’s «Scale», the hierarchy of major factors of psychological well-being, determined in both cases on average indicators of experience of students, does not differ significantly. Namely, «Personal growth» remains the most notable resource both in the conditions of a coveted pandemic and a war time. According to the results of an associative experiment conducted in the second year of the war, the dominant semantic category as a generalized reaction of Ukrainian youth to the verbal stimulus "Psychological wellbeing" has been "Internal processes and states (internality)" with the basic lexeme "Peace". We consider such result a psychological indicator of a natural personal reaction to a long-term experience of a chronic state of uncertainty and a reference point for optimizing the quality of life of Ukraine population. Our experience of conducting peer-to-peer communication trainings in the process of implementing the joint Polish-Ukrainian project of A. Hudzitska-Chupala and N. Hapon "Strengthening people's commitment to volunteering for refugees from Ukraine. Motivation of volunteers and intentions to volunteer: the role of psychological and social factors" has proven the formation of tools for personal effectiveness in volunteer activities: development of soft-skills for forming workshop participants’ professional self-efficacy and managing their own lives.