In every swimming technique, I tend to look down. This gives much more streamline-ness than looking at what's in front of you, thus increasing your speed.

When surfing, I use an inflatable Starboard Astro Fun SUP surf board, which is something I'd say a regular board. Its good speed, medium broadness and lightness make it suitable for going miles of distance, as well as surfing in a bit tougher waves.