Although the series has been over for over a year and a half, the questions to be answered are far from exhausted. So I've decided to create this new editorial. I've called it rambles because the name suits what I'm doing - the inspiration is my school's newspaper.
To debut my editorial, I've decided to start with the one topic that drives us all - time. The whole world circulates around it, and the Wizarding World can have it circulate around them - at a price though. As Hermione said, "Awful things happen to wizards who meddle with time, Harry".
There are a number of ways to travel with time in the Wizard World. There are probably hundreds, though we only know about two. You can stick your head in a jar in the Dept. of Mysteries at the Ministry, pull it back out a few seconds later, and watch people stare at you because your head has turned into that of a baby's. Or, you could snatch a Time Turner from the cabinet and turn it back a few times and watch the world turn around you - 11 o'clock, 10 o'clock. There are many limits to travelling like this, though.
One thing is that you can't allow yourself to see yourself. I can't let myself burst into my home or I'll think I've gone mad. I can't allow my old self to die, either - which is partly the reason I can't let myself see myself. But first and foremost, I can't let myself interfere with my act of going to turn time. This makes Time Travelling a very dangerous act.
But there are things I simply can't do - I just can't perform the operation. I can't turn time forwards. Though it is never discussed in the books, never do we see the future via time-turning. With the jar in the Department of mysteries, the contents turn into a baby, then back into an adult, but never does it go further than the present self. It seems the Wizarding World just hasn't gotten that far yet - they can't see the future with complete certainty. It would completely defeat the point of Divination, and wizards would by flying all over to see their future selves.
There are ways to see the future, though. Prophecies. They don't necessarily predict what will happen, but rather, they will regulate what will happen to fit what they say. Prophecies are not predictions, but what they dictate will happen, not because it was going to, but because the prophecy made it so. People set far too much store by prophecies, however. Had Voldemort never heard the prophecy, he would never have tried to kill Lily and James, and it would never have been fulfilled. It is up to people what happens to the prophecies' predictions. Half of them never end up happening, anyways.