I recommend you keep your jewellery in the storage bag provided, with the little black anti-tarnish tab, when you're not wearing it. I also enclose a polishing cloth with all shiny silver items. If your silver jewellery starts to oxidise, a gentle rub with this will bring back the shine.
I apply a patina to some of my jewellery. I don't usually seal the finish. This means that the patina may change colour over time, depending on your body chemistry and atmospheric conditions where you live. Personally, I rather like these changes but, if you would like me to seal the patina in, I shall oblige!
It may seem obvious, but please don't wear your jewellery in bed, in the shower, while swimming or hacking through the Amazonian Rainforest!