Wonderful list, the only thing I'd add is to convert a PSD to sRGB before handing off if using a different color space.

Regarding export: the Monitor Color vs. Document Profile popup: http://photoshopetiquette.com/#exporting unless I'm mistaken, this only pertains to the preview of the optimized image within Photoshop.

And if you must embed a color profile on export, save it for photos only.