If you want to break more rules, you might consider chickenwing-ing your arms a bit. Deviate from the homerow and learn to feel your way around at other angles. Then you can hold the laptop closer to you without putting your wrists at a weird angle (though you may have to use a non-thumb finger for spacebar, as I do).
As I type this, my laptop is partly on my belly and partly on my chest, and my wrists are so far out to the sides that they completely miss the front edge of the laptop altogether. The angle is pretty favorable, too: my palms rest on the laptop on either side of the trackpad, and my wrists rest over the left and right sides of the bottom case but have little to no pressure on them.
No RSI here, either. Just make sure you're loose and comfortable and not forcing anything! That seems to help a lot.