severe packet loss at various times in the week...

So over the past few weeks we've been getting severe (50-75%) packet loss at various times throughout the day, this becomes exponentially worse throughout the weekend (i.e. I've had roughly 5-6 separate 30 minute to an hour long stretches, all during "prime" time) Any time I call into Cox support while the issue is on-going they can visibly see my modem going on and off the network for no reason whatsoever. We always end up re-provisioning the modem, which will at least temporarily alleviate the problem. I have a technician coming out on Tuesday, and I can rattle off tracert information and pinging for packet loss all day long, but I was wondering if there was anything else you guys could recommend me finding out to make his time here as efficient as possible (Because I fully expect the signal to be working fine when he's here, just because of my luck)