Consistent with the positive youth development perspective, the experience of internal and external assets is associated with positive development or thriving among young people. This proposal has been developed and tested mainly in the United States but it also appears to be considerably true for Roma youth living in post-communist countries. This chapter examines Roma youth (N = 354) experience of various developmental assets and how these assets are related to thriving. Study results indicated positive relations between the assets and thriving, in general. In addition, the experience of constructive use of time was quite low among Roma youth relative to internal assets, such as commitment to learning, positive values, social competencies, and positive identity, and other external assets such as support, empowerment, and boundaries and expectations. While this low experience of constructive use of time could be a general trend among young people, it could also reflect the discrimination and social exclusion that Roma youth often face. Because Roma youth across Europe form a significant and growing proportion of the school-age population and consequently the future workforce, policies and programs that promote both internal and external assets necessary for thriving are essential because thriving has been associated with the development of self and society.