At risk of sounding foully pompous I think that writers' groups are probably very useful at the beginning of a writing career.
Bernard CornwellLooking back, of course, it was irresponsible, mad, forlorn, idiotic, but if you don't take chances then you'll never have a winning hand, and I've no regrets.
Bernard CornwellThen you start another book and suddenly the galley proofs of the last one come in and you have to wrench your attention away from what you're writing and try to remember what you were thinking when you wrote the previous one.
Bernard Cornwell