Further to point F: if you hold down control, you move by word segment - this is camel-case (and underscore) aware. So, if I am at the front of the word "cakeParty", I can move to between 'e' and 'P' by holding control and pressing the right arrow key.
(This is in ST2 for Mac OS X - I'm sure there's an equivalent feature in ST2 for other systems.)
(This is in ST2 for Mac OS X - I'm sure there's an equivalent feature in ST2 for other systems.)