Citrine is a good stone to try sleeping with first. It can leave you with a happier outlook, more refreshed than you've been in a while, and certainly more energetic. Bloodstone can be used for cleansing while you sleep, and some have used it to try to stimulate their dreams. However, be cautious with this as the stone may well bring nightmares as well as good dreams, depending on what is going on in your life right now or in the past.