/***** 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/

You’ll notice the global classes at the bottom, which cover basic styling, and will remove styling that we intially set. For example, the .nobullet and .noindent work great on an unordered or ordered list. You can add your own classes there that you use a lot.

Another CSS Reset

css

CSS