the whole idea behind the RC technique is that you do it so often like clockwork that it becomes a habit and you end up doing it in your dream out of habit and at that point the RC should fail and make you realise that your dreaming.

The best RC to use is to look at your watch remember the time, then look away and look back at your watch. If the time is the same, then you are not dreaming, if the time isn't the same the 2nd time u look then u r dreaming. Also, the watch is good becoz u can make an alarm go off every hour to remind you to do it.