File Specs:
Save your file as a standard Quark Xpress (.QXD) file.

Graphic Links:
Make sure all graphics imported into your file are in CMYK format. There is no need to include a copy of any imported graphics used.

Fonts:
Use Truetype Fonts rather than Type1 Fonts whenever possible. Always supply a copy of ALL fonts used in your document.

Color:
All colors and swatches used need to be CMYK based.

Miscellaneous Info:
Nothing at this time.