If you must use wireless, download Inssider
and run it at various times for a few days.
That way, you'll hopefully see a little hole in the fog for yourself. Try to keep at least 3 channels away from any outside networks. If you can't do that, keep away from the strongest networks.
You can instruct your wireless client to only use your network but achieving this depends on which OS you're using.
Edited by Deadbeat (Tue 05-Apr-11 21:24:33)