There are many, but here are a few.

In the org files, to collapse and clean up the outline visuals:

  #+STARTUP: hidestars indent overview

In init.el (see [1] for define-keys macro):

  (define-keys org-mode-map
    ("\C-cl" . 'org-store-link)
    ("\C-cw" . 'copy-org-link-at-point)

    ;; Make links work like chasing definitions in source code.
    ("\M-." . 'org-open-at-point)
    ("\M-," . 'org-mark-ring-goto))

A helper [2] to quickly export a subtree to HTML is very handy.

[1]: https://bitbucket.org/shoover/emacs.d/src/4f5461d826c92c749b...

[2]: https://bitbucket.org/shoover/emacs.d/src/4f5461d826c92c749b...