If you want a space between paragraphs, you can use multiple :print""; statements (an empty string is valid) or use :print "\n\n\n"; as Auraes said.
If you don't want a space between paragraphs (like in a list of items), you can use "print"^n^Item 1\nItem 2\nItem 3^m^"; The first escape sequence suppresses spacing between paragraphs. The last escape sequence returns you to normal.