Mac: Ctrl + click
Don't forget about what perhaps is the single biggest timesaving feature of them all: contextual menus. Contextual menus provide you with literally hundreds of additional shortcuts. Too many people forget to incorporate this feature into their workflow.
I think my favorite contextual menu shortcut is using the Rasterize Layer command from the contextual menu: (Ctrl + click) [Right + click] on a Type layer. To find those that work best for you, just (Ctrl + click) [Right + click] on palettes and the canvas with various tools and note the options that appear. For example, depending on where in the Layers palette you click a styled vector, you can adjust its blending options, rasterize its mask, or adjust its layer effects.