The Four Common Sense Principles that Amateurs Can't Grasp

[oren]

A naive question: When he says "Don't surround territory" does he mean do not surround it until an invasion or reduction makes you do so and/or leave it until the endgame to do so?

I think the point he's trying to make is don't play a move with the singular purpose of trying to surround territory. In many of his games he gets a large moyo by playing forcing moves against his opponents. He doesn't try to just map out a big space.