C-x g Grep in git repository
M-x find-file-at-point Find (open) filename at point
M-x browse-url-at-point Browse URL at point
-C-x k Kill all buffers that are not visible
+C-x k Kill buffer
+C-x c Clean up all buffers that are not visible
C-x b Select named buffer
C-x C-b Show all buffers
C-x C-r Show recent files