You still have much to improve with your dream recall. It is good enough, but the better your DR is, the higher your chances of being lucid 
So keep continuing with your DJ, and if you wake up in the middle of the night with a dream in mind, never postpone writing it down. You must write every dream down when you wake up from that dream is you want to keep improving your DR.
RC’s are not a must, but they are good to have. I have personally become lucid only once by randomly doing a RC in a dream, the other times were all other techniques. Do RCs as much as you can, it never hurts to do more. Physical RCs may look weird at times (imagine someone pinching their nose shut and trying to breathe through it or someone trying to push a finger through the palm of the other hand in a serious moment), so I suggest mental RCs instead. Read this to get an idea of mental RCs and try to implement the most you can from that source, imho, it is a really good one.
To boost your chances of getting lucid, you must always keep a positive attitude. There are some foods that are said to improve the vividness of dreams and lucidity, it may be worthwhile to do a research on that in the forum if you’re interested. Besides, there are some people saying that certain phases of time affects the same things as well, it may also prove to be effective if you kept statistics of your LDs and DR and compare it with the phases of the moon to see if there’s a relation.
I hope this helps 