Maybe not on a race to race basis but definitely over time.
My advice, and I'm only one amongst many, is to learn how to lay, and I mean lay properly. Not by some mechanical system, because horses are not machines, not one out, but lay proper books, put the odds in your favour, work at it, and reap the rewards. I have got to the point now where over time I know I will win, so this year I have been taking bigger risks where possible and not dwelling on any losses. This has been my best January ever and the results have been no different to any other month it's just that I'm betting bigger, and I'm by no stretch a big bettor.

Of course this is not the only way.