1) Go to your PC manufacture website, and download all drivers available. Then, move them to a flash drive, etc.
2) BACKUP YOUR FILES!! I cannot stress this enough. If you have a Live account, you can store up to 7 GB of files on SkyDrive.
3)Follow this tutorial. http://www.eightforums.com/tutorials/2299-clean-install-windows-8-a.html
4) Install all drivers you downloaded.
5) Use Ninite to install all programs you frequently use.
6) Install any other software Ninite doesn't offer (Photoshop, etc.)
7) Enjoy!