/***** Global Settings *****/
 
html, body {
border:0;
margin:0;
padding:0;
}
 
body {
font:100%/1.25 Arial, Helvetica, sans-serif;
}
 
/***** Headings *****/
 
h1, h2, h3, h4, h5, h6 {
margin:0;
padding:0;
font-weight:normal;
}
 
h1 {
padding:30px 0 25px 0;
letter-spacing:-1px;
font-size:2em;
}
 
h2 {
padding:20px 0;
letter-spacing:-1px;
font-size:1.5em;
}
 
h3 {
font-size:1em;
font-weight:bold;
}
 
/***** Common Formatting *****/
 
p, ul, ol {
margin:0;
padding:0 0 1.25em 0;
}
 
ul, ol {
padding:0 0 1.25em 2.5em;
}
 
blockquote {
margin:1.25em;
padding:1.25em 1.25em 0 1.25em;
}
 
small {
font-size:0.85em;
}
 
img {
border:0;
}
 
sup {
position:relative;
bottom:0.3em;
vertical-align:baseline;
}
 
sub {
position:relative;
bottom:-0.2em;
vertical-align:baseline;
}
 
acronym, abbr {
cursor:help;
letter-spacing:1px;
border-bottom:1px dashed;
}
 
/***** Links *****/
 
a,
a:link,
a:visited,
a:hover {
text-decoration:underline;
}
 
/***** Forms *****/
 
form {
margin:0;
padding:0;
display:inline;
}
 
input, select, textarea {
font:1em Arial, Helvetica, sans-serif;
}
 
textarea {
width:100%;
line-height:1.25;
}
 
label {
cursor:pointer;
}
 
/***** Tables *****/
 
table {
border:0;
margin:0 0 1.25em 0;
padding:0;
}
 
table tr td {
padding:2px;
}
 
/***** Wrapper *****/
 
#wrap {
width:960px;
margin:0 auto;
}
 
/***** Global Classes *****/
 
.clear         { clear:both; }
.float-left    { float:left; }
.float-right   { float:right; }
 
.text-left     { text-align:left; }
.text-right    { text-align:right; }
.text-center   { text-align:center; }
.text-justify  { text-align:justify; }
 
.bold          { font-weight:bold; }
.italic        { font-style:italic; }
.underline     { border-bottom:1px solid; }
.highlight     { background:#ffc; }
 
.wrap          { width:960px;margin:0 auto; }
 
.img-left      { float:left;margin:4px 10px 4px 0; }
.img-right     { float:right;margin:4px 0 4px 10px; }
 
.nopadding     { padding:0; }
.noindent      { margin-left:0;padding-left:0; }
.nobullet      { list-style:none;list-style-image:none; }

http://www.crucialwebhost.com/blog/master-stylesheet-the-most-useful-css-technique/

One of the most common mistakes I see beginners and intermediates fall victim to when it comes to CSS is not removing the default browser styling. This leads to inconsistencies in the appearance of your design across browsers, and ultimately leaves a lot of designers blaming the browser. It is a misplaced blame, of course. Before you do anything else when coding a website, you should reset the styling.

Master Stylesheet

CSS