[jburgess777]

Going 5Ghz is definitely a step in the right direction. Not only does it provide greater bandwidth for more channels but the reduced range actually helps avoid interference.

The downside is that you might need more access points to achieve equivalent coverage. Forming a mesh, like these Google APs do, is useful for avoiding additional wiring.

The beam-forming features present in 802.11n and 802.11ac also help reduce interference.