There is a very specific purpose for each meeting we attend on Sunday (Sac Mtg = communal worship and spiritual renewal; Sun School = doctrinal study; PH/RS/YM/YW = personal and communal growth and service, practical discussion, organizational planning; Primary = too many to list and truly the most challenging, exhilarating, frustrating and exhausting), and even when I'm not learning anything new in a meeting I feel a responsibility to listen intently, observe those around me and try to help them learn from that meeting in whatever way is possible. Sometimes that is by verbal contribution; sometimes it is by smiling at a speaker; sometimes it is by nothing more than a reverential focus.
I have found that I can GROW in almost any meeting I attend, as long as I'm not hung up on having to LEARN intellectually during the meeting - and sometimes I learn amazing things from a meeting or someone in that meeting when I might otherwise think they and it can't teach me anything new.
I have found in my life that my attitude is MUCH more important to what I get out of church meetings than what is said in those meetings. It really isn't even close.