The most important thing is to go into your BIOS and boot loaders and turn off any delaying options. The second most important thing is to boot from a SATA SSD.

The most important thing is to go into your BIOS and boot loaders and turn off any delaying options. The second most important thing is to boot from a SATA SSD. You should be able to tune it from there to get a reboot under 30 seconds.