DILD also called dream initiated lucid dream is when one becomes lucid while in a dream. DILD is different from WILD which requires one to already have conscious awareness before entering the dreamscape. This form of lucid dreaming can use of a variety of methods to achieve complete consciousness. One can also go to sleep with the intention of having a lucid dream via affirmations.
Intention is crucial for this technique to work. I find DILD most helpful when used with a combination of reality checks, dream signs or seeing something out of the ordinary. One thing to remember is that once you become lucid you have to maintain lucidity, otherwise you might lose consciousness and the dream just becomes a normal dream. Through personal experience I find the WILD technique more successful than DILD.
Most of my DILD attempts often involved me being bored in a dream or realizing how silly the dream is and suddenly I become lucid. Once I started using reality checks it increased my DILD attempts by a huge margin. You might find that DILD can take less work on the part of the dreamer than WILD.
If you want to experiment with the DILD technique you can also try the wake back to bed method, hypnosis, or mnemonic induction of lucid dreams. The possibilities are endless with this type of technique, but again whatever technique you decide to use it must be consistent, otherwise it could be a waste of time and effort.