As often as not they seem to be found in the room the went missing from. Look everywhere and in everything! Take some time to sit in the room when its quiet, maybe with a book and just listen. Look high as well as low, people have found them in the top of closets and sitting on top of book shelves. Look in smaller places then you think they can be, you would be shocked how well they can contort their bodies.

My sister's corn snake was found in a box under his cage, UNDER the dog bones that filled the box. We sat and listened and heard something shifting, got closer and realized the little sound was coming from the box, looked inside and still didn't see him. We pulled it out and tipped it a little and saw a glimpse of his orange color! If you don't find him asap, don't panic! I found my 1700g normal bp 2 weeks after she went missing, about 4 feet from her cage! I tore that room and every other apart for the whole 2 weeks with no sign of her, my dogs and cats ate in that room, my husband's computer was in there (so he practically lived in there) and still no sign for 2 whole weeks. Then one night as I was going to bed, I just glanced in with no real hope and there she was! Coiled around the edge of my desk.