This is the best tutorials I've found on getting different browsers to behave similarly with respect to padding and margins. It's an oldie but a goodie. I'm loving' it.

Global White Space Reset by Andrew Krespanis.


Here is his offered up code.  I urge you to read his post though to learn about the why's and wherefores.

1. * {
2. padding:0;
3. margin:0;
4. }
5. body {padding:5px;}
6. h1, h2, h3, h4, h5, h6, p, pre, blockquote, form, label, ul, ol, dl, fieldset, address { margin:20px 0; }
7. li, dd, blockquote { margin-left: 40px; }
8. fieldset { padding:10px; }

or for a little pizzazz: 

1. * {
2. padding:0;
3. margin:0;
4. }
5. h1, h2, h3, h4, h5, h6, p, pre, blockquote, label, ul, ol, dl, fieldset, address { margin:1em 5%; }
6. li, dd { margin-left:5%; }
7. fieldset { padding: .5em; }