Bullets are very helpful in providing a format which is informational and easy to read. Long paragraphs are often skimmed through although they may contain important details. In a quick review of a resume, the skills section and bullet items are often what the eye is drawn to and should contain the most relevant information. The experience section should be in chronological order and gaps in dates should be explained. It is important to differentiate between consulting and permanent positions.
Technology changes rapidly, therefore the most relevant experience is the most recent.
Experience more than 5 years old can often be summarized, particularly if it is outdated.