There are some great resources available to help you to refine your kayaking skills, plan trips, etc. Here are a few of my favorites:
An amazing all-around reference for kayakers - look here first if you have questions.
Sea Kayaking Safety Guide
From Transport Canada - our tax dollars at work! Includes the rules, and some helpful checklists.
A local resource with lots of discussions and ideas for trips
Coast and Kayak Magazine
A great local publication, and tonnes of links to other resources
The body that structures the recognized paddling courses in our great land. Good place to check out skill levels and competencies to help decide whether you want more training.
Rolling your kayak
My favorite video so far - he makes it look so easy!
Here is a great series of videos demonstrating the basics, and different styles of rolls
Back deck sweep
C to C
Back deck rodeo
Twist and slice