TEXT. Convert all text to OUTLINES (also called CURVES or PATHS).
COLOR. Use CMYK color, not RGB. Submit a physical proof (if possible) for best color match. Give PMS callouts for critical colors.
RESOLUTION. Raster-based graphic elements must be at least 100dpi at final size. Elements requiring sharp edges should be created as vector elements, because they are scalable. If your layout is not fulll-size, specify the scale clearly and prominently.