Photo: from Adam Van Koeverden video
Below are stroke tips picked up from fellow paddlers, blogs, videos, etc. This is an attempt at detailing the ideal stroke. Given the differences in paddling philosophies, bodies and abilities this is not meant to be how we should all paddle. It's a framework to think about the stroke as we all find what works best for each of us.
There is no substitute for a good coach. If you don't have a coach, have a friend videotape you. Compare your stroke to videos of paddlers you are trying to emulate. Since the stroke is complex one strategy that can be helpful is to pick just three elements to work on during a practice. Focus on one element at a time. Rotate among the elements during your practice.