Make sure you aren't just telling yourself that you will have lucid dream, you have to truly BELIEVE it as well. Know in your mind 100% that you will easily become lucid. No doubts. Also, when you are performing your RCs during the day, pause for a moment and imagine that you are in a dream right now. Look around at your environment and pretend you are dreaming...then perform your RC and see if you actually are. Don't just casually perform RCs or they will not work like they should. Good luck to you and I'm sure you will be LDing in no time. Remember, the first one can be difficult, but with time and experience the process will only get easier. Keep working!