Yes I would second this.If you rush, you will screw up. Before you continue on, I suggest you thoroughly go through the entire guide, all of the forms and the checklist a few times. Print everything out, write down all of your questions. Be thorough.
I've no idea if I did everything correctly but you've got to aim for perfection.
You're welcome to ask as many questions as you like but people like canuck_in_uk are probably overqualified for the basics which are in the guides.
Follow the checklist, follow the brief guide, follow the long guide, read the faq here - http://britishexpats.com/wiki/Spousal_Sponsorship-Canada/FAQ_-_New_Application_Forms
Think of it as an exam with pass mark 100%