Do you know exactly how tomorrow's gonna be like? Maybe you have a planned schedule, but that's not really how it's going to be.
Think of today. Today is the tomorrow you didn't think of yesterday. If yesterday was today, and today was tomorrow, it would be the same thing...for today is the tomorrow you didn't think of yesterday.
If tomorrow would be your birthday, for example, you already might have an idea of how it's gonna be like, but when tomorrow comes, some few points of what you have thought of or planned, though it isn't exactly the same.
Have you ever had a day of misfortune, depression, or other mischief? Those days may seem unimportant, though, but think about those days. Think of them as a challenge. Think of what you can do to avoid them or make something out of it. Then that day would slowly turn into a brighter day than it used to be.
Some days are really meant to be harder or tougher than most days. Well, they're still important, too! You can think of them as tests, or something like a "brain teaser".
Work TODAY...play TOMORROW...learn from YESTERDAY...for today is the tomorrow you didn't think of yesterday.