First, make sure you're in edit mode (press i ). Then you can paste with Ctrl + Shift + V , if you're in a terminal emulator like gnome-terminal (or select "Paste" from the right-click menu).

You can also type :set paste in vim before you paste to disable automated indenting, etc. Then :set nopaste after you've pasted the content.

Also check this question on stackoverflow.com for more information.