Time Travel?

Time travel always bites like a mosquito at my mind when thinking of things like Harry Potter, Shadow of Destiny, the Butterfly Effect, and Chrono Trigger. The idea of a time paradox is what makes me think that it's so illogical. You can go back and visit yourself but then you would mess up the entire flow of time if you did that.
How could you change events after having met yourself?
How could you live or get through a certain situation if you survived/did not survive to be able to go back in time?

If time travel was possible, then I would force myself to think of the concept that there are infinitely many timelines, and that if you do mess up somehow when time travelling, then you just change the timeline you and others exist in.
So I think we should never even try to come close to that possibility of time travelling.

Jam it back in, in the dark.