2. Teleportation Devices
3. Time Travel
I don't buy the argument that if time travel was possible than we would encounter time travelers in our own time. If there are time travelers they would be better at hiding their identity than Dr.Who is, they would be highly trained in blending into modern (ancient) society, or they would use light-bending cloaking technology to walk among us without being noticed.
Also, time has to unfold the first time for there to be a future time period populated with time travelers, like the original wagon trails that later became railroad lines, there had to be the original settlers to go forth to establish the path, and we could in the original timeline that is slowly (too slowy) moving to the future. I would like to think that one day, time travel will be possible so I can save Stevie Ray Vaughn or prevent Lucas from making the prequel films...and maybe look up Raquel Welch while she was filming Hannie Caulder. That would be legendary.
4. Faster-than-Light Travel
5. Generation Starships
7. Personal Force Fields
8. Reanimation from Cryo-Suspension
9. Downloading your Mind
10. Preventing the End of the Universe As We Know It
Either way, it is unlikely, that even if we board the good ship Leonora Christina, the human race will not be able to outlive eternity, one day it will end, all of it, and we are just going to have to get use to it, because no technology or weapon system will prevent it. Some believe that by this point, if human civilization is still around, we could escape into an alternate reality.