Recently a friend of mine was trying to figure out how to improve their wi-fi reception throughout their apartment. Certain corners were just near deadzones with either no reception or painfully slow wi-fi. Upon asking a few questions, the problem seemed to stem from the location of their Apple Airport Extreme, tucked inside a cabinet in the far corner of their house. I recommended positioning it higher and outside the all-wood cabinet. Voila! Improved reception!
It looks like David Goodier had similar issues, and decided to mount his Airport Extreme high above a coat closet door. But instead of using a retail wall mount, David turned to good ole IKEA for an affordable and ingenious $8 solution. Two sets of GRUNDTAL hangers hold the wireless router perfectly in place, with the edges of the coat hangers slipping right into the slotted detail all around the Apple Airport Extreme unit, securing the router while also permitting additional airflow underneath.
On a scale of 1-10, the project looks like a "2", especially if you mount the router slightly lower than ceiling's height, removing the aid and requirement of a step ladder (but remember, mounting a router high usually results in better overall broadcast/reception for wireless signals).
I created a template by tracing the airport on a sheet of paper and measured where I thought the mounts should be located. I made a pdf version of the template and it can be downloaded below.
Additional information about how to mount the Airport Extreme over at David's smile-inducing titled blog, There's always something else to mess up.
Of course, there are some off-the-shelf retail mounts available if the DIY instructions above seem more daunting than inspiring. Companies like Mac Mount and HSquared make an array of wall and horizontal mounts for Apple products to get your router or other accessories off the ground (and possibly still out of sight).
(Images: IKEA; Apple; David Goodier; Mac Mount)