I usually can't get 100% because I simply don't game online on my Xbox. I have the original model 360, which you have to have the internet directly wired into it. And I have the Xbox in my man-cave, while my modem is in the living room.
I do have a 100% on Elder Scrolls: Oblivion GOTY, though. Nothing online on that one. I was quite proud of that achievement since that game is so incredibly massive.
None of the games I've plat'd have any online trophies - when I see online trophies I pretty much instantly decide I'm not going for that one.
That said - I can't recommend this enough for getting wired internet to isolated areas of your house:
http://www.amazon.com/Linksys-Powerline-Network-Adapter-PLSK400/dp/B006JG5S6U/ref=sr_1_4?ie=UTF8&qid=1405545242&sr=8-4&keywords=ethernet+over+power
That's a newer model than what I have but the same basic principal. Super easy to setup (just plug it in, basically) and if you ever need to move your modem and/or your consoles, it's a snap to move it someplace else. I recommend this to anyone that needs to extend internet in their house - more reliable than wireless.
How, exactly do you set up & use that?
It sounds like it might be just the thing for me.
My set-up has my pc/router/modem on the 2nd floor but all of my consoles are on the 1st floor.
Sometimes I get lucky & my wireless works fine, but - just as often...I can't even sign-in, browse, sync trophies, etc.
So...what would I have to do?
Keep in mind...I'm shit with any/everything tech-related (EX. I have no idea what to do/how to do things involving "changing/resetting router/modem pins", etc, etc, etc).
Is there a simple "Fer dummiez" way to somehow get this thing to work for someone as tech-ignorant as me?