Learning from books vs. learning from experience

Learning how to learn is a question of general interest, since everybody is learning something new every day. People want to be good at what they learn, but one cannot achieve this goal without putting the question as to the best way to learn a specific subject matter. When should one be more practical, and when should one be more theoretical? Not everything is contained in books, but not everything can be learned from experience alone either. Knowledge gained from theoretical books are usually the appropriation of systematized series of observations made by different people, while knowledge from experience comes from fewer individual observations made by a single person. Scientific books, for example, are usually written summing up experiences of many individuals, trying to be as objective as possible. On the other hand, when one learns something only by his\her own practice, he\she has a limited number of personal, subjective experiences, before establishing his\her...