Thank you, it’s a great article.

Personally I also try to list my past (successful) request within my new request.
This way a developer will be ensured I do know the meaning of money.

Spend some time to properly close your request. Name the developer, and rate his entry in your original request.
This way other people can learn from your experience with this coder/designer.
Also, don’t forget to thank the developers who have replied, but haven’t received the assignment.

As already mentioned in the article, communication is a must.
Make sure you’ll always have access to past communications. Don’t sign up to a third party website. Or make copies of your writings when you do.
When communicating by MSN Messenger or alike make sure it 'll create a proper backup of the things spoken of.