Answer by ivanleoncz for How can I make Vim paste from (and copy to) the system's clipboard?

I believe that this question deserves a more objective and pictorial answer:

Entering Paste Mode

• ESC
• :set paste
• press i
• SHIFT+Insert (with a text copied on your clipboard)

Leaving Paste Mode

• ESC
• :set nopaste
• press i

You pasted the text and you're able to type again.