Oooh, toughie!
I guess the magical stariway would be my mode of time travel. Then again, I suppose you could end up somewhere you didn't intend to, and that could be sticky.
The PT room can change without warning, so that's dangerous.
I-Ching requires tossing those wands to get the change hexagram, and having to do that over and over could lead to carpel tunnel syndrome, which I already have and hate, thank you very much.
Seances aren't reliable, either. Only Vicki got sent back in time that way, and look at the mess she made of things.
I suppose I'll just stay here--and now!
Love, Robin