I don't think the cryonics of today are a very good bet for immortality, and mind-uploading may still take a while to develop... So I guess your best bet is to use the currently known methods to improve your life expectancy, and hope for the situation to improve during your lifetime (or even better, work on it!).
What looks, at the moment, as the most feasible technology that can grant us immortality (e.g., mind uploading, cryonics)?
I posed this question to a fellow transhumanist and he argued that cryonics is the answer, but I failed to grasp his explanation. Besides, I am still struggling to learn the basics of science and transhumanism, so it would be great if you could shed some light on my question.