A common mistake is people think you should tell the li padding to be 0px but this is wrong.
All you need is the following code in line:
<ul style="margin:0px">
<li>your item</li>
<li>your item</li>
</ul>
In a css class:
.yourclass {
ul.margin: 0px;
}
css, ul, li, identation, padding, margin, items, px, quot, yourclass,