Valerian is quite amazing and I find it prolongs my dreams into an almost continuous thread. It is the best OTC sleep aid for me, and I have tried them all. In combination with Kava Kava and melatonin, it's nighty night. Take at least one hour before bed time on an empty or near-empty stomach. Of course if that doesn't work, it's Ambien time, but that's another story.
Kava kava I don't know about. It seems like another overload: valerian, melatonin and kava kava seems like it needs something like fruit juice or vegetable juice to drink with. I'll try it to see what happens, with a juice.