I had a knot geek moment this morning when I was lurking in the solo self-belay thread and someone mentioned tying one-handed alpine butterfly knots. I consulted teh Goooogle and found how, but didn't like it. I found one other method after digging around that I really like now: It's a hybrid of the 'three wraps around the palm' method and the 'twist the rope twice' method. Very fluid and doesn't require eyeballs, just muscle memory. Especially nice for tying butterfly knots with long loops.
For your consideration:
[Is this common knowledge and I just missed the memo?]