I've been in a few critique groups over the years and I've made some good friends and learned a lot along the way but one of the best ways to learn something is to try something new.
So, me and my writings buddies try to take a few writerly field trips every now and then. We have visited French bakeries to flavor our stories with true tastes and smells. We've visited a psychic to learn a little more about ourselves and our characters. We've even planned to visit a couple publishers to see the entire process of production.
So, have you gone on any writing/reading field trips lately? If not, maybe you should. You just might learn a little and enjoy the journey :)