First off, read that link tosxy gave you from top to bottom. It is gold.
I don’t have LD’s nightly, but I’ve been managing to get them about 1-3 times a week through autosuggestion and RCILD. As far as RCILD goes, it’s just a matter or doing RC’s as often as possible. Within a couple of months, sometimes much faster, it will generally pay off.
Overall, however, the best way to ensure LD’s is to learn to communicate that to your subconscious effectively (known as autosuggestion). Once you find a tech like MILD, WILD or RCILD that works for you, adding autosuggestion will greatly improve your chances.
I suggest you read this.