Buy a program and get to it. Minimum bet is $2. When you get to the window, say the number of the race, the dollar amount, the type of wager and the horse(s) number(s). If you're making multiple bets, say this whole script for each bet.
For example: "In the sixth race—2 dollars—to win—on the 6." Write them down on your program in that order so you can rattle off your bets at the window. This can be a high-pressure situation — arrive at the window prepared.
If you've never bet on a horse race before but are looking for something a little more adventurous, go for a "trifecta." That means you're trying to pick the first, second and third place horses in a race — in order. That bet will cost at least $6. If you like three horses and want to bet on them to "win" "place" and "show" in any order, that bet is called a "trifecta box."
Another bonus tip: Don't throw your ticket away until the race results are final. Many a photo finish has sent grown men crawling on the ground in search of a winning ticket they thought was a loser.