If you want to support green computing, the most basic thing you can do is reduce your brightness. More light equals more energy consumption. That's why there are websites that are made as exact copies of other websites except they're entirely black because the color black spends less energy. You can also try to fix your things when they get broken instead of throwing them away instantly and buying a new one.
Your parents,your school,google,your social media accounts
I don't know if this is on your list, but I know for a fact that the Nintendo 64 system (or N64) has a 64-bit architecture.
Put a code or security system on or a very secure password
Hope this helps...