Hello there. I'm visiting a place where there is no wireless in the apartment and I use my mobile's tethering device to connect to the internet. When not in use, I immediately turn it off, and I'm not using iTunes. I know tethering uses more data, but it seems that's it using a lot more than I thought.

What are some ways to limit data on my computer (e.g. turn off automatic updates), on my computer's browser and on the mobile itself. I thought you could turn off application updates on my Samsung - but not sure how to do this. In addition, should I be limiting Facebook to the computer or phone or does it matter? Any help would be appreciated.

Thanks!
-far from being a computer geek