The assumption that today's German students are able to successfully combine synthesis achievement values and well-being values appears to be overly optimistic when regarded from the perspective of motivational psychology. The results of a qualitative-quantitative interview study with 25 students indicate that achievement and well-being values may come into conflict in everyday life. Incentives for achievement and well-being rarely co-occur in the same action domains. Whereas the school context is dominated by achievement incentives, leisure time is dominated by well-being incentives. Since both achievement and well-being are appreciated by most students, they should be prone to experience frequent everyday action conflicts. The motivational characteristics of postdecisional action conflicts are described on the phenomenal level and their possible impairing effects for learning processes are pointed out. Finally, alternative forms of value synthesis, which might be realized more successfully, are discussed. (Contains 1 table and 3 notes.)