Images
Tiff or EPS formats 300 dpi at the finished size work the best. Try not to scale more than + or -15% from the original scan size to avoid quality problems. Pictures copied off the Internet are usually only 72 dpi and not good enough for printing, they will most likely come out looking fuzzy. Small (2" x 3") color pictures that are not at least about 3 mgs. in size are probably not high enough quality.
Bleeding
Bleeding refers to ink being printed off the edge of your printed piece. Always position your object so that at least 1/8" extends beyond the edge on the final page size. This can be done on 1,2,3, or 4 sides of your printed page
Font Styles Menu
Are you using the fonts styles menu by clicking on the "B to make your fonts bold " or the "I" to make your font italicized? This probably will not print correctly. In QuarkXPress or Pagemaker, you may want to make a font bold or italicized the easy way. Risky idea. If a font has been stylized to bold or italic via a font style menu it may not result in a bold or italic version when it is printed to a PostScript output device. When working correctly, stylizing a font will work ok when printing to a PostScript device. The font will look for the bold version and substitute it in for the stylized regular version. With the multitude of fonts and font manufacturers this frequently does not work correctly.