When my nice was little we told her that there was a "binky fairy" that came and took pacifiers to give to new babies and that when it was time for the fairy to take the pacifiers they would leave a special basket and we had to gather them all and put them on the front porch and the next day the pacifiers would be gone but a special present would be left for her. It worked wonderfully.
Ds is always afraid that there are monsters in his room. I bought an all natural lavender room spray and called it "monster spray." If its a rough day I not only spray his room but his clothes and bed too. About 10 minutes after our "monster extermination" he is asleep. DD had to have her own spray so hers is rosemary and lemon.