Well, there are a lot of things you can do to produce good birds. Breed birds that don't have any DQs or serious faults. Breed birds that are healthy. If two birds show the same fault, don't breed them together, or you risk establishing the fault for many generations to come. Example, if you have a rooster with a small crest, breed him to a hen with a large crest instead of one with a small crest. If one bird has less than good foot feathering, make sure you breed it to a bird with better foot feathering. 
Breed your best birds to your other good birds if you can. Only keep less than perfect birds if you feel that you can build upon them or you feel they have something to contribute to your line. I have read that inbreeding is commonly used with silkies to create the best birds, but remember that after a few generations, inbreeding depression will begin to set in. Add some new blood every now and then if you plan on inbreeding and DO NOT breed brothers to sisters. Grandparents to grandchildren and parents to children are ok. 
Supplement your breeders' diets so that they create vigorous offspring, etc.  Read the standard for silkies so you know all of the defects and DQs. 
Record what certain breedings result in. If two birds produce a show winner, repeat the breedings. Good luck with your breeding program!