Most people agree that smoking an indica heavy blend of weed is the best kind of thing to smoke if you are trying to use weed so you can sleep better. Remember - indica = "In da couch" ie, the kind of high where you feel pleasantly happy snuggled up in your blankets sailing off to dreamland. Sativa heavy blends can make your mind spin faster than is helpful at bedtime, and some have reported that it actually gives them strange dreams.