Here's a few losing strategies that I can vouch for:
Back all horses when they reach odds of 1.01 on BF on the basis that if their odds fall to 1.01, they can't possibly lose.
Back all favourites on the basis that, if they are favourites, they have the best chance of winning.
Back all steamers on the basis that all those punters who backed it and caused it to steam can't be wrong.
Lay all drifters on the basis that all those punters who layed it and caused it to drift can't be wrong.
Lay all horses that go into a big lead at the start of a race on the basis that they will run out of energy before the end and will get caught and passed.
Following a lost bet, increase the stakes on the next bet to a level such that it will completely recover the losses incurred on the previous bet. If the next bet loses, increase the stakes on the next bet to a level such that it will completely recover the losses incurred on the previous two bets etc. (This is known as the Martingale principle and, provided that you have sufficient funds, eventually, you will win and completely recover any past losses.)
Psycho
