Reducing Your Bandwidth Usage on your WP7

Since I got my first smartphone (iPhone 3G), I have had the Fido 6GB data plan for $30 extra on top of my voice plan.  Some of you have probably manage to negotiate your data plan with voice down to around $47.50/mth but that's probably still quite expensive for some (HowardForums have tonnes of resources should you want to negotiate for a cheaper plan)

Some of my friends have opted for the lesser data plan of 150MB, 250MB but with a smartphone (non Blackberrys. BB devices tends to use a lot less as BB is connected to the RIM servers which does a lot of data compression), that much data can be used up in less than 1 week if you keep using your data via 3G (I average around 1.2 GB on my iPhone 3G and I am using about the same on my HTC Surround - similar types of usage).  My friends come to me for advice on how to save bandwidth, because in their eyes, I am the tech savvy one (aka. biggest nerd they know).  I am going to list out a bunch of things you can do on your WP7 device to save some bandwidth.   Some of these "hints" of course are pretty similar should you want to save bandwidth on your non-WP7 devices.