Relax. This might seem obvious, but it can be one of the hardest parts of keeping a great poker face. Remember those butterflies I was talking about? You want to find a way to get rid of these as soon as you sit down at the table. Remind yourself that you are only playing a game and that you have the proper knowledge to be successful. Remember that you will always play better when you are relaxed.
Play at the Right Level. Okay, so I talked about how you should remind yourself that you have the proper knowledge to be successful; well you have to make sure that you’re not playing over your head to make sure this is true. Choose a table and stakes that you feel comfortable playing. If you are betting with more money then you feel you can afford then you will never be relaxed and your face will show it. These ingredients do not make for a great poker face.
Talk Normally. You will be surprise at how many players will talk different at the tables then off. It can be obvious at times, they will try and get into others players heads. I can tell you that 95% of these people are no good at it. In most cases they are just giving other players at the table tells rather than really tricking anyone. Talk in a normal voice and have normal conversation, don’t try anything tricky it will most likely end up back firing on you. This will also help keep you relaxed.