Never say no, but rarely say yes (2011)
Downside of this approach:<p>Often you are quoting a super high price because you don't want the work and maybe it isn't really what you love to do or your expertise.<p>But the buyer assumes you have a super high price because you're the best and can charge what you're worth.<p>End result:  The buyer is unhappy with your work, because you priced as if you were a world leading expert and actually you are learning on the job and don't want to be there anyway.