Silks should be dry cleaned, which is why they are impractical. An additional way to keep them looking nice is to iron them on a low setting. I have found that the best way to keep hijabs is to fold them into a triangle shape. That way when you take them one out of the drawer, you just have to open it up and it's ready to wear. Trust me on this one, your hijab drawer will be messy, so it's an effort to keep it in some semblance of order.
Some sisters just take off the hijab, leave it pinned, and hang it on a tie hanger.
I have yet to figure out how to get a pinned hijab on my head, so I always unpin it before I put it away. Since most hijabs are of a delicate material, always remember to be careful when pinning and unpinning your hijab. Sometimes the pin gets stuck on a loose thread, and it can pull a big ugly rip or gather in your scarf. It usually falls off this way, until you get adept to moving around with this scarf sliding around on your head. Tied under your chin, you run the risk of looking like someone's Grandma Polanka.