You just have to do RCs enough so that they carry over into a dream. For some people, it takes a day, some a week, month, maybe even more. If you do them VERY frequently during the day, they should kick in soon. But if you're a bit forgetful about them, it will take longer. It's kind of about luck, but doing RCs more will increase your chance! A good way to remember to RC is to weite something on thr back of your hand, and everytime you see it, RC. Do a couple different RCs. Like look at the clock a lot. They are usually weird in a dream. Sometimes they will read something like 7:77 and right away you should know your dreaming. My main RC is the nose plug, it has never failed me! Also you should try a WBTB too, you'll have a much higher chance of a lucid dream, and you'll recall some other dreams too.