There are many kinds of bets that can be made today as compared to 30 or 40 years ago when the win, place and show bets were about it. You have today not only win, place and show bets but exactas, trifectas, superfectas, doubles, pick3's, pick4's, pick5's and pick6's. Every day for every track there are morning line (ML) odds on every race. If you watch the tote board then you can record the tote odds and see how they change as you get closer and closer to post time. Both the ML odds and the tote odds can give you a clue as to the kind of bet that may be best for this race. A few examples may illustrate this.
Example 1
Initially by looking at the ML odds you can make a first assessment. If you see a heavy favorite, say
1 2 3 4 5 6 7 8
4/5
The rest of the horses are 3/1 or larger. A win bet on the 4 horse makes sense, except for the fact that the payoff may be very small for the amount bet. A way to increase the size of the payoff would be to bet the exacta. Bet the 4 horse on top to win and any of the other horses to come in second. Note that the greater the tote odds for the second horse that places the higher the exacta payoff will be.
Example 2
Another example of using the ML or the actual tote odds to set up a bet that fits the odds again with say 8 horses might look like this.
1/1 6/5
2,6/ALL
We could expand the size of the payoff by going to a trifecta that might look like this
2,6/2,6/ALL
Note that the 2 and 6 horses would be in the win and place positions. If either the 2 wins and the 6 places or the 6 wins and the 2 places then the bet pays off. A hedge bet that I like is
2,6/ALL/2,6
This will take into account a higher odd horse slipping in and taking the place position which I have found often occurs.