A good tutorial.

http://lifehacker.com/bring-back-the-old-f8-safe-mode-shortcut-in-windows-8-577175460

To bring back the faster, simpler, old school bootloader from Windows 7 and before, you just need to run a simple command:

Open up the Start menu or screen and type ”cmd.” Right-click on the Command Prompt selection and choose ”Run as Administrator.”
Run the following command:

bcdedit /set {default} bootmenupolicy legacy

Restart your computer. You can now press F8 before the blue Windows logo appears to see your advanced boot options.

You can still enter Windows 8’s new tiled Repair menu by choosing ”Repair Your Computer” at this menu, which is nice. If you want to reverse this process just run:

bcdedit /set {default} bootmenupolicy standard

Restart your computer and it’ll go back to Windows 8’s newfangled way of doing things.