Good grip for one-handed page turns
This is probably a big DUH for long-time Kindle users, but I'm new to this game and so are many others.
I'm finding that the grip shown below works well for page turns during one-handed reading. Rest your thumb so that it straddles both the Next Page and Previous Page buttons. To avoid inadvertent page turns, position the thumb slightly towards the screen. A slight rocking motion of the thumb, down or up, turns the page, while your hand (and the Kindle itself) remains stationary.
Many have wondered whether the K3's page-turn buttons are too small. With this grip they feel just right -- spacious, even.