Actually, I always do this before going to sleep. It is necessary for me to do. If I don't do it, I'll keep being distracted by noises, thoughts etc. It might also just be me (I have ADD(that rhymes))

I didn't really call it SSILD since I did not know it existed. For me, it was just like some sort of relaxing method. When I wake up in the middle of the night, I tend to do WILD instead of doing SSILD again. Most likely because I can get to sleep very easely once I woke up.