How to live forever?

And by forever I mean at least 200 years.  Maybe 1000 if I'm lucky.  These anti-aging supplements only do so much to prevent oxidative damage.  Growth hormone injections might keep you going for a little while.  Beyond nutrition I'm looking for a way to make DNA ignore that cells have to split a limited number of times in one life.  I don't want my cells to stop splitting, but I also don't want cancer. 

Cyborg parts or no, brain cells can't be regenerated and die all the time, so by age 150 you'll be retarded and have memory holes the size of saturn even if you manage to live that long.