Time traveling is one of the more advanced technologies utilizing dimensional and temporal manipulation. Before you hop in your vehicle and flip it on for the first time, you should probably understand the basic principles of leaping through space and time without ripping your molecules into quantum tatters.
Of course there are some people who are born with the ability to travel through time, and can learn to gain complete control over it, but for those of us who can't, we can use mechanical devices called, Time Machines.
There are two kinds of time machines. The first uses something called, Molecular/Partical Accelleration. This is where you speed up your molecules at faster than light speeds, to the point where everything around you seems to be stopped. This could be done by either super-charging your molecules, or speeding them up using some sort of magnetism. You could also slow down your particles to negative the speed of light, and have the effect of travelling into the future. Unfortunately, this method could not be used to travel into the past.
That's where the second kind of time machine comes in. It uses something called, Flux Compression. This is where you compress something heavier and denser than anything else in the universe.The effect of which is, it rips a hole in the time-space continuum, creating a wormhole. Wormholes are like short-cuts through time and space. If you go through one, you'll end up in a different place and time. If you calculate it correctly, you can go to a time and place of your choice. This could be used to travel into the future, travel into the past, or instantly transport to another place.