I want to stay within a 5GB per month limit. What things should I avoid? I never download huge files. No torrents. Much of my web surfing is done via skweezer or google's mobile proxy.

But I'm particularly interested in streaming audio. Would I get to 5GB in a month if I streamed BBC World Service all day every day (as a hypothetical example)?

Thanks!

64 Kbit/s stream, which is more than most streaming services provide, translates to about 30MB per hour, so you get about 160 hours per month.