Setup like an Ollie. Except put your front foot a little over the front of the front bolts. So your front foot is about on the part where the board starts to curve up to the nose. Ollie like normal. The rest should be a natural reaction. Your front foot will slide up over the nose come off the board then your natural instinct is to put it back on the board. That's it...
When I do this trick, I slide my back foot to the middle of the board which helps the board level (not the front foot). This trick is also called a one-foot ollie.
ollie norths are way easier on kickers or launch ramps... it looks cool if they're well done