[Narvin blinks a little, tilts his head. He isn't sure whether to be overwhelmed by the barrage of questions or to puff up with pride at Wander's display of awe. (Narvin thought that Time Lords were very impressive himself, but it wasn't often he got other people agreeing with him.)]

Well...the most common method involves a time capsule, a machine one enters and travels within, but time rings will work in a pinch and are easy to produce and simpler to transport.

I personally have done a fair amount of travelling through my work, but not everyone does. I've been back about ten thousand years or so. Others have been further, but I never had any need.