Stipulations:
- You cannot die and are immune to disease
- You cannot alter the future such that you change the world from your point of origin. i.e. You cannot become so famous that future people recognize you as immortal.
- If you vary the timeline too much you will cease to exist.
What happens when you get to your birth date? Do you stop existing as a time-traveller and start being a baby? I was born in 1952, so I’d get less than seven years of time travel. Hardly worth the effort, especially if I don’t remember it.