Day's and night's rune is a method I use quite often.
Sometimes I draw 3 runes for Past - Present - Future or Cause - Event - Consequence.
My favourite method is one I was inspired by Kaedrich's book but it is somehow complex. I am preparing an article where I explain the background and, of course, the method.
I like that idea of a random cross referencing for additional clarity. Something I sometimes do myself, although I am more prone to watch for random things in my environment (car, building, billboard, animal, etc) to inspire that additional moment of clarity.
I'm a huge fan of the 9 Rune cast, selecting a random 9 and then casting onto a cloth and reading from there. I discard anything that falls off the cloth, but runes that land upsidedown, I interpret as hidden/unmanifest/uncounsious energies, depending on the context of the reading.I find for me, it's the best way to let the depth of the runes shine through (although it gets difficult to decipeher when all 9 runes are involved.) And I agree with winter.skadi, when a rune "accidentally" drops out of the bag, it's usually trying to say something.
What I mean is that I take my three runes and relate them randomly to a book paged at random. My questions are mostly requests to teach me... So say I pull a rune and after thinking about its meaning I might grab my Bible or Koran and say "Teach me more about this rune" or maybe I want to know about its energy I might pick a book of my shelf on physics or animal totems. I don't often read runes for others as I no that my reading would be only psychoanalysis of that person based on the runes and I am a good shrink so it leave people thinking that I have secret powers. I don't like that as it is dishonest. If the person is dedicated to learning the runes then I am happy to do readings with them, but not for them.
Aids are important. We all need help to get were we are going, from ourselves and those around us. How frustrating would it be to hear "Ok the answers are already in your mind somewhere.....go find them" without any further assistance. It's also interesting to me the different contexts that diferent "aids" will colour the information we are trying to receive.
And I'll make sure to post a blog when I locate that mysterious diagram!