Alan Baxter talks about the secret ingredient of many published works:
My most recent short story is all my own work supposedly. But it was critiqued by three of my best writing pals. It has significant additional scenes in the middle from one pal’s suggestions, a completely reworked end from another pal’s suggestion, much juggling of motivations from the third pal’s concerns and greatly polished final words from the input of all three. All of those things I’ve just credited separately were actually raised by all three because they’re bloody good advisors. It’s the solutions I used that I’m crediting really, all of them tempered with my own ideas. The best critiquers don’t tell you how to fix something – they just tell you what doesn’t work and maybe why (for them). It’s your job to decide whether to take that on board and it’s your job to fix it.
Read it here. I couldn't agree more: http://www.alanbaxteronline.com/work-unofficially-collaborative/