Each browser has its own line heights, spacing of margins, padding, headings font sizes and so on. Designers use Reset CSS files to reduce these browser inconsistencies.

Few famous and mostly used CSS reset files are

Eric Meyer Reset CSS
YUI 2: Reset CSS

Below is the step by step guide for a very easy and simple RESET CSS file by Russ Weakley.

View more presentations from Russ Weakley.

MORE EASY TO USE CSS STYLES

CSS Quick Tip
How to Convert PSD to XHTML/CSS
Creative CSS Examples