UUhhh... just wanna say that I think strafe jumping is alot easier if you use the left stick...
Kinda hard to explain, instead of using the right stick to look left/ right really quickly, just move your left stick forward-right/ forward-left...
You should be looking left of where you want to go if you're moving left stick forward-right. Vice-versa
Oh, and you start off running at the direction you're not jumping. (If you're going to jump with left stick forward-right, then start running forward-left)
It's hard to explain

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On MW2, on the map Rundown, there's a little strafe jump to get to a roof and it requires you to run on a thin "wall", just run on the wall with left stick forward-right, and then move left stick forward-left and jump.... Look at where you're trying to get to in this point....
Hard to explain....