I've been keeping note files with the following header
###--- section ##-- subsection #- subsubsection
Is there a way to customize speedbar to navigate over these? Right now M-x speedbar just gives me directory listing. So far I've been using "M-x occur #-" for this purpose.
You could use a simple derived mode and imenu. For example, suppose your notes are in files with the extension ".notes":
(define-derived-mode notes-mode text-mode "notes"
"Mode for editing my notes."
(setq imenu-generic-expression (list '(nil "^\\s-*[#]+[-]+\\s-*\\(.+\\)" 1))))
(add-to-list 'auto-mode-alist '("\\.notes" . notes-mode))
(eval-after-load "speedbar"
'(speedbar-add-supported-extension ".notes"))
The regexp is a bit crude, but you get the idea. You could font-lock the headers too if you want to make them stand out.