How to call your action
Here is a mistake that brick and mortar beginners make. When you want to make a raise, you should not say, “I call your bet and raise you XYZ.” Your initial action is considered your final action. So if you say, “I call …” it means you just want to call. If you want to raise, say “raise” and state the amount you want to raise, if it is a no-limit game (the amount of the raise is obvious in fixed-limit games).
