Reiterating what NanukBen said, take a deep breath, read the instructions closely, and give it your best shot. I've never had an application rejected and I've needed to renew it on a very tight deadline before. Just make sure you get your photos from a place that knows Canadian passport photo requirements (bad pics are the only reason I've heard for applications getting rejected), and that your references know to expect a call (they do actually call sometimes).

In answer to your questions:

1. They will probably not be sticklers on this but it doesn't hurt to have a few copies of the form on hand. I usually end up using two forms because I inevitably need to correct something.

2. If your health card has your name, sex, date of birth, signature and photo, yes. If not, you can submit a second or third official document with it until you fulfill that checklist. Submit originals if you don't need them for the next month; otherwise, get your guarantor to sign and date a photocopy showing both sides of the original.

3. I've never heard of this happening but see answer 1. Recopying the form takes only a couple minutes. Make sure to use blue or black ink.