- Store jewelry when it's not being worn in your house with no humidity or moisture. Such as your bedroom or a closet. Especially not in a bathroom.
- Store jewelry in a container. A box or even pouch will do, long as it is something that will prevent air from getting to it.
- If you have the space, you can also store your pieces individually. Such as in their own pouch or box. This is sometimes best when you have jewelry with precious stones to prevent any scratching against other stones/precious metals.
If you want to get really serious, there are anti-tarnish tabs (they look like pieces of film) or bags that prevent tarnishing. I've used the little tabs to help keep my store inventory clear and tarnish-free.
Remember, dry silver is happy silver!