Let me ask you this:
Do you have a well defined system by which you trade? What I mean is do you have a system that eliminates any and all subjectivity from your decision making?
If you do, then the only thing you should pay close attention to is never to deviate from your system in real trading.
If you don't, you should concentrate on a strict set of rules that define your trading system during the paper trading sessions. Once you have the system set, measure your success rate on a large enough sample of trading. Only then should you switch to live trading, and the success rate should remain more or less the same.
This is very good advice, one of your biggest enemies in trading is emotion. It can be helpful in some situations but often it is going to prohibit you from making sound decisions. By having a clear methodology in place you can make sure that your emotions remain in check.