As far as products and grooming goes... I would start grooming now so that she will be used to it as she gets older. I use Plush Puppy Products and LOVE them. They were recommended by my breeder. Their website is
www.plushpuppy.net I use the Evening Primrose Shampoo, Silk Protien Conditioner and the Reviva Coat. If you are totally new to Yorkie Grooming, call Monica at Plush Puppy and she will tell you what products are right for your dogs coat. Also don't use a brush with little balls on the end. It breaks the hair. Don't brush a dry coat. For daily grooming get a leave in spray conditioner that you can use before you brush. I use the Reviva Coat for this. As for putting the topknot up, try getting some of those little rubber bands like the dentists use. They won't break the hair like the regular rubber bands. Good luck and always happy to help!