Tips for golfing in Lisp What general tips are these for golfing in Lisp (any dialect)? Please post one tip per answer, and only answers that are specific to a dialect of Lisp (e.g. "remove comments" is not an answer). 

Please post the dialect of Lisp your tip applies to with your tip.
Order function parameters to minimize whitespace
Instead of
(defun f(a b)(...))
...
(f x(1+ y))

try something like
(defun f(b a)(...))
...
(f(1+ y)x)