Actually, I've learned a few things. First: when taking down wallpaper, give yourself plenty of time, and use lots of water--make the wall as wet as possible, and then it peels off so much easier. But it will still take ages. And your arm will still ache. Even if you only worked for a few hours.
Second: You can only bend so far when you limbo. Seriously. And you will probably ache all over the next day, unless you are a bendy five-year-old--who, incidentally, will always win the competition. Sorry, but it's seriously stacked against you.