Tell us some of the things that you do to avoid lecturing constantly. Then we can start to do them to.
Me: I make an oath on the first day of school that I will never lecture for more than 1 period per day of AP Biology (we have 2 periods every day). And I stick to it. This makes it possible to do other things. It also makes students take a little bit more responsibility for their learning. Win-Win.
Plus, I never "lecture." What we do is probably best termed a "formalized discussion"