various emacs shortcuts

• In org-mode, <s[tab] inserts a BEGIN_SRC/END_SRC block. (Think "insert source".)
• Bookmarks
  • C-x r b - jump to bookmark
  • C-x r m - create (make) bookmark
• M-o M-s / M-o M-S - center line / center paragraph
• M-<Home>, M-<Page Up>, etc. - move in other window/frame (without losing focus on the current window/frame)

• cursor movement

  • C-a / C-e - beginning of line / end of line
  • M-a / M-e - beginning of sentence / end of sentence
  • C-b / C-f - backward one character / forward one character
  • C-p / C-n - previous line / next line

• C-l - recenter top/bottom

• C-j - newline and indent
• C-c h - hide lines matching
• C-h e - show echo area messages