get a better connection ...
I just dumped ATT dsl cuz it svcked.... I had the upgraded dsl and it still didn't deliver. Just got on cable. Prices are much better than they used to be in my area ...
Also... do you have a bunch of PCs using the connection? Turn them off or take them off the network .... Even if no one is using them spyware can be using the bandwidth in the background
Also... when I was on dsl, the connection would get slow every few days so I'd unplug the router and restart it and usually it would get a better connection...