I would go with my senses? I'd have a nice smell, soap or perfume, maybe shampoo (the soap or shampoo to remind me how much I love having a hot shower, being "clean"), maybe a pillow case to remind me to change my bed, for clean sheets (or just my pillowcase; the good, clean smell does wonders for me); for me, a favorite book or two; maybe a CD with music I liked. I have some small items, costume jewelry, etc. from my childhood that hold happy memories. . . How about a chocolate bar, a special treat?