I've been working on an originals band with a few friends. It seems like whenever we get together for rehearsal, we end up jamming and coming up with all kinds of stuff that we like- which is good. The problem is that very rarely do we do anything with the things we come up with, which has been fine with me for some time as we're all sort of rehearsing playing with each other (getting our communication down, getting a feel for what we can all create and what kind of stuff we all want to play), sort of getting a feel for being in a band together. But it seems like sometimes we'll latch onto something, come up with more parts (verse, chorus etc) and over the course of rehearsal have a song which just needs lyrics written to be complete. Then we go home, come back next week and forget all about that, and start on something completely different. So, my question is what would you do in this circumstance? How do you find a balance between rehearsing and jamming/writing in a rehearsal session?