Okay I’ve written up a rough first draft.
Title: Please read before posting.
Getting the best response from a request for volunteer work.
Here are a few ideas for you to consider before you post a request for volunteer work. This post is here to make it easier for you to be taken seriously when asking for volunteer work, and make it easier for people looking for volunteer work to do, by hopefully reducing the number of unsuitable posts being made here.
Please give these a read before posting, and think very carefully about whether you are ready to post your request.
1: Represent yourself in a professional way.
Read through your post before you post. Do you sound like someone who is serious about what they are doing, and just wants a helping hand, or do you sound like someone who wants a volunteer team to make an MMORPG for them? Pay special attention to your tone and try to keep it real.
2: Show your work so far.
People are likely to be skeptical of your project if you have nothing to show for it so far. Make sure to include in you post: your own background; any screenshots, concept art, or other artwork from your project so far; and any other proof that your project is going somewhere. In most cases, this is an essential part of your project, and if you don’t have any work to show so far, think very carefully if you’re ready to ask for volunteers to join your project, and maybe come back later when you do have progress to show.
3: Be specific about what you want.
Think carefully about what kind of artist you want. Do you want a modeller, or a compositor? Which task specifically do you want done? Make sure to post an image of what you want in your original post, rather than making people ask for reference images in their replies. Again, if your answer to this is more along the lines of “I want everything done”, consider coming back later when you are sure exactly what you need doing.
4: Stay modest.
Remember that you need someone’s help. Don’t ask for a “pro”, an “expert” or a “Blender Jedi”: we have the Paid Work forum for that. Don’t try to pretend you are a large VFX studio if you’re not. There’s no shame in being an individual project looking for a helping hand. Blender Artists are not naïve, and they can sniff out a fake.
Good luck with your project,
Gilly.
I hope it sounds about right. I am aware that much of it has been borrowed from other parts of the site, and we need to add a few points to it 
Gilly.