Desktop advice is approximately useless to us laptop owners, and several attempts at reducing interference produced minimal results. Web searches almost exclusively turned up almost guides for Mac Pro (the desktops) or some long-winded crap about how to minimize RF interference. I was getting absolutely horrendous range (< 3 feet) on ALL of my devices but only when they were paired to my Mac.
There seems to be a lot of people trying to figure out how to accomplish this seemingly simple task, but not that many offering working solutions, so I decided to add to the cause.
Background: After much searching and digging through outdated forums and support threads (usually peppered with snide, and unhelpful commentary), I managed to successfully set-up a Bluetooth dongle on my Macbook.