On main personal PC:

It won't do Modern Standby properly, so it always kinda hibernates, ergo: Press Power button, make a coffee, wiggle mouse and click things once desktop appears so I know it's finally responsive. To shut down I just ignore it like the naughty boy it is until it sulks, tries to sleep, and finally falls into hibernation.

Gaming/VR PC:

Modern Standby works perfectly. Press power button, instantly awake, ready to go. Also leave it to sleep when I'm done.

Work PC:

It's a Surface Pro 7, as such it has a mind of its own. I approach it cautiously so as not to startle it, and treat it gently so it doesn't reboot when I click on stuff too fast.

In case it's not brutally obvious, these are Windows 10 PCs

Shutdown:

    sudo shutdown now

Shutdown if I'm feeling generous:

    sudo shutdown -r now

Boot process:

    *press power button*
    *sip coffee*
    *start working*

I manually close every window on the various workspaces. This helps me to clean my mind. Then clean the Desktop, which has now become visible, Then, shutdown. Now go to drink water, usually. Then, power on and enjoy a fresh session. If mad at the world, sudo halt.

For work it's 1. press power button 2. Ctrl + Alt + T, to open a terminal 3. . ./start_{project_name}, to execute a script setting environment variables and starting programs

Each day it saves me a few seconds and the start scripts also serve as documentation.

Shutdown: echo 1 > /proc/sys/kernel/sysrq; echo o > /proc/sysrq-trigger

Boot:

Wake on lan via Phone

Shutdown: Press power button, or apm -Z. Bootup: Press power button.

What in specific are you looking for?

Shutdown: Schedule Shut Down, Complete! (attributable to Cal Newport)

Boot: Power button.

Shutdown: ctrl+alt+shift+q

Simply ‘sudo reboot’ really.