Centering Ordered and Non-Ordered Lists ?

If your theme has a built-in custom CSS option, use it; otherwise, get a custom CSS plugin and put:

ol, ul {
margin: 0 auto 1.5em;
display: block;
width: 50%;
}

Another option is to put this instead:

ol, ul {
text-align: center;
list-style-position: inside;
}

The first code will put the list items into a block and center the block on the page, so the list bullets will still line up properly. The second code will center the text of each individual list item, so the list bullets will not line up.

@shapshifter, if you only want your change to apply to the content area, you can use a more specific selector like this. This limits the changes to only the entry content area.

.entry-content ol, .entry-content ul {
    margin: 0 auto 1.5em;
    display: block;
    width: 50%;
}

If you only want this change to apply to this specific page only, you can get more specific using the post id body class (found in the opening body tag) like this.

.postid-14980 .entry-content ol, .postid-14980 .entry-content ul {
    margin: 0 auto 1.5em;
    display: block;
    width: 50%;
}

You are welcome, and you can try playing around with things to get it to look the way you desire. Since you had the two columns on that page, I wasn’t able to work out the actual CSS needed. You might try the second suggestion from @stephencottontail on a page without columns and see if it gives you what you are wanting.