Time is the greatest saga of life, use every seconds wisely, anything you do now, counts in the future. Opera said "Doing the best at the moment puts you in best place in the next moment" another words from a wise person is you can predict your life with what you're doing now.
Imagine it this way; What is the future of what I'm doing now if I continue doing it? Does it intensify my future or the reverse.
Put in mind that, time you wasted can never be recovered and you have 86,400secs everyday. Are you doing the righteous things with it.
Don't waste your time. Be obsessed with your passion every secs. Michelangelo said "There is no greater harm than that of time wasted."