Vim shortcuts I can't remember.

:set tabstop=8 Set hard tab width to 8, useful if you open a file by Emacs which uses 4 spaces for one level of indent and hard tab for 2.
"+gp Paste from system clipboard after cursor
"+gP Paste from system clipboard before cursor
"+y Copy to the system clipboard
/gc Confirmation in a global search and replace
:e $MYVIMRC edit .vimrc in vim
CTRL-U scroll up half a screen
CTRL-D scroll down half a screen