X-MEN: Days of Future Past

What would you correct from your past to save the future?

If I could go back in time, I would not undo any of my mistakes, but... 

I would persuade my "old" self to develop the habit of documenting all the mistakes I made (within the same day, if possible), and reflect on them. Of course, I should document all the pleasant things that went my way as well.

This simple habit alone would accelerate my progress in becoming a better person.

With that, I wouldn't even need to "save the future" because it would take care of itself.

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As an X-men fan, I'm looking forward to watching "Days of Future Past"!