Tips for having the healthy PC

Gonna give you some tips, eh. Like:
-. Turn off when you don't use it;
-. use features or software which make the harddisk rest when you aren't access it;
-. Try to search softwares in your computer that can make your computer save more power;
Usually, the modern hardwares & technology have this feature;
-. Don't keep turning on the softwares that you don't use, like bluetooth, or Internet Connection,
widget, etc;
-. Turn off printer, scanner or speaker when you don't use it. But i think if speaker, it may be
hard
because you must use speaker when playing games, listen to music, watch video/film, etc;

-. On the desktop PC, monitor also eat a lot of power. The trick is, try to adjust lower
brightness& contrast. But for hardcore gamers, try just to adjust lower brightness.

maybe we think that," bah, it will only save a little bit of power". But wait, if all computers do this, we can save a lot of power, right guys?