Example - http://jstn.info/html.html - link rot, example no longer available.
Notice the text is centered, but the bullet points themselves are not.
You asked the same question at Centering
Give your div a class name center. Assuming your div width is 200px, margin:0 auto will center and text-align:left will align the text to the left while maintaining its centering due to margin auto.
.center{
width:200px;
margin:0 auto;
text-align:left;
}