I've found the majority of my wireless problems are due to living in a condo complex with 30 other wireless routers within range. The wireless spectrum was never designed to handle that kind of traffic within the same frequency. The solution is to change your setting to Wireless N * ONLY * on the 5ghz band. Problems usually go away, but then you won't be able to connect your iphone to the wifi, and most guests who come visit wont be able to get on your wireless. Also, things like the PS3 will no longer work over your wireless network, so there are trade offs involved in going to N only.