Distribute Free Content – I often ask my write to put a nice article and than put the links to it and than give it on forums as free incentive content. We even pay (sometimes) $10 if the blog is good. What this does is, it gets a you a very nice in content link from a relevant page.
Asking bloggers to write the blog post has 2 draw backs, they will charge more and secondly, they can never come up with proper content of your wish. So spend 10 more minutes and make sure you get the best.