So if you're looking for some ways to win books, there are a few options, go to the publisher's websites, they always have competitions running, and why not enter?
There is currently a competition for a $200 book pack from Random House:
link and you can keep an eye out on all of Random House's competitions
hereRight now Penguin Australia don't have any open competitions, but keep an eye out
hereHarlequin also have some competitions
hereAnd another good places is Goodreads, they have hundreds of competitions a month for free books, see
here I believe you need a Goodreads account though.