Ante
An ante is a forced bet in which each player places an equal amount of money or chips into the pot before the deal begins. In home games, the amount of the ante is typically small. In games where the acting dealer changes each turn, it is not uncommon for the players to agree that the dealer provides the ante for each player. This simplifies betting, but causes minor inequities if other players come and go or miss their turn to deal.
Blinds
A blind or blind bet is a forced bet placed into the pot by one or more players before the deal begins, in a way that simulates bets made during play. This is used frequently in casino and tournament games and is designed to ensure there is betting action on each hand. The most common use of blinds as a betting structure calls for two blinds: the player after the dealer blinds about half of what would be a normal bet, and the next player blinds what would be a whole bet. Sometimes only one blind is used, and sometimes three. In the case of three blinds (usually one quarter, one quarter, and half a normal bet amount), the first blind goes "on the button", that is, is paid by the dealer.
For example, the first player to the dealer's left (who would normally be the first to bet after the cards are dealt) makes a blind bet of $1, and the next player in turn posts a big blind of $2. After the cards are dealt, play continues with the next player in turn (third from the dealer), who must either call $2, reraise, or fold. When the betting returns to the player who blinded $1, he must equal the bet facing him (toward which he may count his $1), fold, or reraise.
An additional privilege is given to the player who posted the big blind to compensate for the fact that he is forced to bet. If there have been no raises by the time his first turn to bet voluntarily comes (that is, the bet amount facing him is just the $2 he originally put in), then he is given the right to raise at that point, even though his right-hand opponent's call would normally have closed the betting round under other circumstances. This "extra" right to raise (called a live blind) occurs only once: if his raise is now called by every player, the first betting round closes as usual.
In some fixed limit and spread limit games, the big blind amount is less than the normal betting minimum. Players acting after a sub-minimum blind have the right to call the blind as it is, even though it is less than the amount they would be required to bet, or they may raise the amount needed to bring the current bet up to the normal minimum, called completing the bet. For example, a game with a $5 fixed bet on the first round might have blinds of $1 and $2. Players acting after the blind may either call the $2, or raise to $5. After the bet is raised to $5, the next raise must be to $10 in accordance with the normal limits.