Congratulations!
Basically,you'll need the oath letter and PR card (these 2 are the only things they asked from me on my oath date). The oath letter will inform you to bring a couple of IDs like DL,health card,passports (old and current);and all the original copies of the documents to support your citizenship application ,bring those too just in case........
If for any reason, you don't get the oath letter,call CIC at once.
Congratulations once again!