Dude explains how to double your connection speed without paying anything extra:
http://www.youtube.com/watch?v=lG5cEik2ABY
All you need is a second cable, a pair of scissors and some tape. Not tried it yet, but it looks legit.
And something similar for wireless connections:
http://www.youtube.com/watch?v=ED5vl6IYto0
Cool kid.