How to make an horizontal list

Someone asked me how, so here it is. Paste the following code in style.css of your theme :

ul, li {
    display: inline;
}

For example, for the default WordPress theme, it will be :

#sidebar ul, #sidebar ul li {
	display: inline;
}

It’s up to you to find the correct CSS code, as the themes have different stylecheets. My only advice would be to play with FireBug, a FireFox plugin.