I have noticed the configurations of many others use a function similar to the one below to add some intelligence to moving to the start of a line. It seems like a good idea. 

(defun mak::cycle-bol-boi ()
  "Cycle between beginning of line and beginning of indentation."
  (interactive)
  (let ((orig (point)))
    (back-to-indentation)
    (when (= orig (point))
      (move-beginning-of-line 1))))

(global-set-key (kbd "C-a") 'mak::cycle-bol-boi)
(global-set-key (kbd "<home>") 'mak::cycle-bol-boi)