I don't fully understand RCs. So through my day i'm at home, then go to work, then come back home. I've heard different variations of RCs, that you SHOULD NOT do them randomly, because the chances of just randomly doing a RC in a dream are slim, but that you should do them when you feel like something is unusual or could be in a dream...

Now, my day has no unusual occurrences, if i go to the store, nothing seems unusual. So how am I suppose to RC in a dream, if I don't even properly understand RC in RL.

I am keeping a dream journal, and attempting WBTB technique, but I feel like that won't help until I fully understand RCs, and how I would apply them to a dream.