Faculty members, students, post-docs, teachers, researchers, and administrators have certain duties and responsibilities to teach, serve on committees, mentor and engage in public service. It is irresponsible to shirk these responsibilities, or to do such a bad job that you will not be asked to do them in the future. Visibility and recognition of research activities and teaching are essential to move ahead in a career as a scientist. A career involves investment and sacrifice, such as agreeing to write review articles, giving research seminars, attending meetings, reviewing papers and grants, and getting involved in the activities of your school and professional societies. Be as selective as possible to achieve the most from the most efficient expenditure of time.
Quality counts more then quantity.
Define your specific interests when setting priorities. If you are passionate about encouraging girls to get interested in science, mentoring graduate students, or interacting with politicians, then say Yes to activities that have these goals, even at the expense of other requests. Why to Say Yes. Analyze why you say Yes. Perhaps you are approached by an old graduate school buddy to review a grant, manuscript, or college program because you have the unique and perfect qualifications to do a good job.