There are many Ubuntu install guides available online, most of them falling somewhere between mediocre and okay.

But this one is great.  Detailed instructions are included for users looking to switch from Windows, and this guide covers more than just the install process itself – it also includes information on configuring stubborn drivers, enabling codecs, and making sure Flash works.

Highly recommended.

If, after you’ve installed Ubuntu, you’d like a more involved guide, http://ubuntuguide.org is a great secondary resource.