“Don't waste life's time.”
“Don't waste your time on life.”
“If you love life, don't waste time, for time is what life is made up of.”
“Life is a waste of time, and time is a waste of life. Get wasted all the time, and you'll have the time of your life!”
“Don't waste your time or time will waste you.”
“Don't make your own life your project in your own life: total waste of time.”