Emacs features a minor mode, mouse-avoidance-mode, which causes the mouse to move away from the Emacs point when the point gets too close. This can be really helpful if you're used to moving your mouse away from the cursor to avoid typing "underneath" the mouse. In your custom-set-variables section in ~/.emacs, add the appropriate elisp:

(custom-set-variables
 .
 .
 '(mouse-avoidance-mode (quote animate) nil (avoid))
 .
 .

The animation parameters of mouse-avoidance-mode can be customized with M-x customize.