I have been doing some lucid dreaming off and on for quite some time now, and I still find that RCs help dramatically. I also think it can vary from person to person as well. For some, it may be better to RC every hour in the day. For others, it may be to simply remember what happened the night before in their dreams by writing in their dream journals. I also have to agree with what Lucid is talking about. There seems to be something about dreams that feel different in a way, and after several LDs you will be able to pick up on this "aura" that Lucid refers to it as. I would always call it a "vibe" that I am getting when using my senses. There is just something about your environment that doesn't feel right if it were real.

Just be patient, and use all the techniques together until you find which one is the best to focus on. The time will come