Well, a typical page on trials-forum is 250kb, but a full one (I.e. 40 replies) can be around 700-800kb. Email really isn't very much, something like 4kb for a text-only message, less than 50kb for most even with loads of images (E.g. my last Amazon newsletter with all their offers is only 42kb). Youtube is about 6 mb per minute, ish. I dunno about you, but I probably would use up a 2Gb allowance on TF alone There are certain programs that can monitor your usage, switch it on for a day and see how much you use? Or just check your network connection if you don't use the network for file sharing/whatever.