If you can travel back to any point in your life to give a single advise to your past self, taking into account the person you were, what advise would you give, and why you think your past self will listen?
What single advice? Simple - everything is going to be fine. Through the hardships and tough times and burdens and emotional baggages, all those will come to past. Have a little faith, put in the best effort I can at the time, and trust that all will work our fine.
Lame advice? Yes. Because I don't want to fuck up who I am right now. Am I perfect now? Far from it. But I wouldn't know what butterfly effect it's gonna be if I were to change something crucial all those years ago. Those experiences have defined me.
Oh yeah, in hindsight, I guess I will tell my old self one thing - that in the future, I will be given the opportunity to travel back in time to give my younger's younger self a single advice, and the advice will be, don't say too much.
Ok, as I read it back, I can understand how movies around time continum is so hard to make!