I do it similar to Amphy, but I shuffle the top to bottom, dropping off a little every time, so the pile I picked up is randomizes. Next, I flip the deck and repeat. After all that, I do that thing where you take the deck in half and let cards from each pile fall on top of each other. Even after that, I cut in an erratic fashion, usually totally at random, mixing piles, mixing cut piles, and mixing those into another pile. It takes a while, but it shuffles very well.
I will dub it- Echna's Shuffle