You seem to have a slightly different definition, I think, based on these remarks -
"It is important to maintain conscious"
"I've heard about Buddhists who train to always stay consciousness while living, talking and whatever,"
"I enjoy more value out of my life if I am more awake, conscious for longer and more frequent periods of time"
I maintain consciousness whenever I am awake, because that's what being awake is, as far as I understand the word. The second quote, well being conscious is a pre-requisite for me talking (unless you count mumbling in my sleep, which does happen).
And I don't think in that last quote you're talking about deliberate sleep deprivation so you can be awake longer (you could be?).It just made me think you were not using the word in the same sense I would. Do you think it's possible to be awake (i.e. not asleep) without necessarily being conscious? If so that would just confirm we have different definitions of that word.
I could be wrong.
(And I don't especially want to direct this conversation towards "what really is consciousness?" because it's a very slippery eel of a topic)