A couple of ways to use this set of tables:
http://www.punterslounge.com/tipster-competition/tipsters/league/all/2012/ (http://www.punterslounge.com/tipster-competition/tipsters/league/all/2012/)
1 Find the top 2 tipsters for a sport and bet BOTH their selections for the win using a dutch book.
2 Lay the selections from some of the worst tipsters, but check the odds before you do to take your liability into account!
High liability has killed many a punters' bank and wiped out their profits over several events in one fell swoop!! :o