Assume that the future can change based on your actions, so any historical information that you bring along with you from the intervening 25 years may quickly drift out of the new realities history.
Edit: also assume that you can be given a healthy 21-year-old body if you want or take your previous self’s place.
Further, identification will be provided for you if you were not born at that time.
4 copies of windows nt 3.1 and tell as many people as possible that in the future electronic pulses will block heated seats in cars and olny unlockable if you pay an extra 4000