If Butterfly Effect really exist,what should we do to change the rest of our lifes?

It has been said that something as small as the flutter of a butterfly’s wing can ultimately cause a typhoon halfway around the world.

 --Chaos Theory

Also,small things in our lifes maybe can make a major difference in the way we live.

I've been thinking this question for a long time.Recently i got my own answer:

Just imagine that you are already 40 years old now,and you have one shot,one opportunity to go back to the age when you are 20 and do sth to improve your future. 

Yup now you are back from there,you are sitting at the computer and planning how to waste your time after surfing.

You almost forgot the purpose(to change the rest of your life) why u come back here.See,,your body is back,but your consciousness still sticks there at the age of 40.At the end,nothing had changed in your life

So all that you can do now is being yourself,grasp the present ,work hard and love someone who is worth your love.then you won't torment yourself when you are 40.

This is my point of view,Now how about yours ?  :)

Seth