Answer:
Gently type on the keyboard.
Set your water bottle on a table that is away from hardware.
Explanation:
The procedures that will keep the computer safe and working properly are:
-Gently type on the keyboard because it will allow it to last longer because if you press the keys too strong they could get stock or it can have problems with the settings and symbols, numbers and letters can start appearing on a different key.
-Set your water bottle on a table that is away from hardware because this will allow you to avoid throwing the water on the computer which will damage it.
The other options will not keep the computer safe and working properly because turning the power off before shutting it down can damage the hard drive, downloading software from the Internet without permission can cause a virus or a malware to infect the computer and washing your hands thoroughly before using the computer won't do anything to maintain it working properly or safer.