Oh, I forgot about the silica packs to keep things dry. I have one in my buttons and in my needle and scissors drawer.
I will nix the dry air for blowing out the bobbin area. It can actually blow very minute bits into areas you can't get to. My technician says not to use it and they don't use it in the shop. A vacuum works better as it pulls out the gook or a paintbrush or makeup brush.
I repurposed an old filing cabinet with the deep drawers for holding patterns and books. I sanded and repainted it. Looks reall purdy now. You would never know it is from the 60's.