If you're working, it's important to inform your employer about the new SIN - that is since the since should change: if you currently have a temp visa, they will have granted you a temp SIN (you can tell because it starts with a '9'). With the PR, we should receive the definitive one.
I can help with the assurance maladie, since I have just renovated mine yesterday (it expired in November, but I've got a new work permit then, since I didn't knew when I'd get the PR. It's now renovated for a worker for the validity of my work permit, but I already asked the questions about the PR): the letter you'll get at the landing will suffice, with a copy of it. You'll also need to bring along your CSQ + a copy, passport with the stamp + copy, and the rent bill + copy (or hydroquebec if you're an owner).
All that said, this is what they told me over the phone. They change a lot, and when I went there in person to renew my card and asked, the guy said I'd need the CSQ, passport/letter and rent. No mention to copies.
Now, here's a tip: you can do all this over the phone and letters, if you're not in a rush (7 days after the call to get documents, few more days for them to receive, few more days to validate and enable, you know the drill), or you can go there and face the long line. Since I'll take the day out of work for landing, I'll do all on the same day.
When I went this week, it was super fast because I went straight there before work, 1 hour before they opened the office. Arrived at 7:30, they opened at 8:30, I left at 9 with all done. The insurance is valid immediately (although your clinic/hospital will need to call RAMQ for a fax to confirm you're covered while your card hasn't arrived).
AVOID Wednesdays. They open at 10:30, I got there at 10:20 and I swear the line was leaving the room - which fits a line of around 20 ppl - and running on the hallway around the elevators. Total maybe 60 people. Scary stuff
Hope this helps.