The Past: What is the past? In brief, the past doesn't exist anymore. Its dead, a dead theory, it only exists in our minds. If your mad about what happened at your past, or yesterday, or last night, don't be! You are wasting your time! Simply! Its dead, its dead events, no matter how much you think about it, it won't change, and what happened won't switch to your benefit. So just drop it! Drop every attachment you have to the past because simply it doesn't exist anymore.
The future: The future is what we all long for, think hard about, work hard to plan, and even die trying to reach it. But guess what? We never reach our future! Now, you might be planning for something tomorrow, or the day after tomorrow. But tomorrow never really comes! You sleep and wake up, and still there is tomorrow, and it is yet to come. Why waste our time thinking about the future and tomorrow, when no matter how much we work hard to plan them, they never come,and they never work as we planned. Did the people in 9/11 plan they were going to die on that day? No! Don't think about the future and don't work hard to plan it. No matter how hard you try, it has plans of its own!
The Present: In other words, The gift! We never really think about the present moment! If we go to a honeymoon with our partner, we think about how much we miss our loved ones and how much we can't wait to go back home and share the pictures and stuff! And when we do that, we day dream and start remembering all the good moments and the good stuff that happened with us on our honeymoons! Why? Why can't we just live the moment? Be happy where we are? When we eat, we aren't really eating, because our minds would be thinking about where will we go, or what will we wear when we go out tonight! When we go on the street, we aren't really walking, since our minds start thinking about the people that are walking, or about the destination we are heading! Its either past or future! Think about the present, and be happy!