Video settings that matter

That's odd, I used to be able to play on High quality in World of Warcraft with my 9400M, but now I can't. Maybe they improved the graphics in Cataclysm.

Anyway, there are many graphics settings like shadows, reflections and particle density. Some use more processing power, yet do not look that much better. After playing around, I found that Shadow Quality and Liquid Detail cause the biggest hits in performance. Filtering did not, surprisingly. It's reasonable to assume different graphics cards will perform differently, depending on how they're optimised.

WoW macros.

Hmm I haven't played WoW for about 6 months. Anyway, these are the macros I use:

Mount/dismount
This macro mounts if you're dismounted: if possible, it mounts the flying mount. Otherwise, it mounts the normal mount. If you're mounted, it dismounts you. I used to use 2 slots for flying and ground mounts, this saves 1 slot.
/cast [nomounted] Violet Proto-Drake
/cast [nomounted] Swift Stormsaber
/dismount [mounted]

Mouse look
This is really useful for playing on notebooks. When you run it, you use your mouse to look around, like playing first-person shooters like Call of Duty. It has the same effect as holding down your right mouse button. To use it, I put it on an unused action bar, such as the right action bar button 1. Then in key bindings I set this to Alt+S, so Alt+S runs this macro. The net result is I use Alt+S to toggle mouse look.
/run if IsMouselooking() then MouselookStop() else MouselookStart() end