No sure if it will work or not since it seems it's uncertain if habits actually make their way into dreams but I think remembering to check things out will certainly train mindfulness.

Actually back when I started LDing all I really did was keep a lookout for electronics; light switches, screens, TVs etc.... and kept noting if they worked because I was convinced "electricity" doesn't work in dreams (back then LD4ALL had this theory that the brain couldn't quite simulate electricity). I got quite a few DILDs just by noticing something electronic.