See what the table is doing. Then work your way up in bet amounts, sophistication and complexity. Pass or don't pass. Of course you should always be aware of a pending aberration of the dice. If you walk up, buy in and immediately realize that you're in a hot hand, get with it.
Nothing's worse than standing there letting a hot hand go by.
You'll not feel good about yourself when it's over. That statement can apply to certain numbers and the table in general. For instance, if you start playing a table and the dice are freezing cold, don't continue to bet. Granted, that table will probably turn warm with a vengeance, but tables can trend a certain way for hours or even days before turning to your liking and you'll be broke long before that. But if that number starts rolling, there's nothing wrong with giving it a little more action or playing the number a little harder than usual.