I like to practice by always trying to find the NS when I'm out at night. A couple of other constellations that can help you find the NS are cassiopeia, it looks like a W. The top of the W open towards the NS. Also, orion can be used but its a little trickier. You take the shorter side 'foot' and 'arm' star and trace through them and thay point to the north star. It gets tricky when orion is lower in the sky. It helps to trace the path in an arc. Imagine the sky as a dome and trace the along the dome. Both take practice since the NS isn't the brightest star, and practce will help you recognize the NS based on its brightness.

Hope this helps.