Remember that the structure of online games change rapidly. Players switch tables all the time and as a result a good game can turn bad in a matter of minutes. Always keep track of what kind of players you're up against.
Live games - gather the information yourself
When you're playing live there is no lobby that will provide you with the needed statistics. Instead you have to observe the game yourself and then decide if you want to play or not. This type of game evaluation is obviously more time demanding and difficult than the one you do in online games.
You should always try to find players that you will be able to outplay. If you observe a weak player at a table you should try to be seated to the left of him. From that position you will be able to take maximum advantage of his mistakes, which are bound to come (naturally, you should also look for weak players when you're playing online). When you're up against tight players you should, if it's possible, sit to the right of them. That will give you good opportunities to steal blinds and win pots through bluffing.
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