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My grandfather is really into National Hunt racing and got me into it. He's been making bets on races for years, but he loses more often than he wins. I never understood why he kept betting when most of the time he just lost money. That was until I won my first bet, and I felt the rush of winning. That feeling really can't be topped, and when you feel the despair of losing a bet, it really stings. I was getting to be like my grandfather because I was losing more than I was winning. Unlike my grandfather, I wanted to change my chances of winning.
The best way I could think of to become better at betting on horse races was to seek out advice from people who do more winning than losing. The Internet helped out greatly with this, because I was able to find out what people were using to form their betting strategies.