What would you do if you met yourself?

Image via Wikipedia

Inspired by an episode of Dr. Who the other day, I was wondering, If you could travel back to an earlier time in your life and give yourself advice about specific decisions or events that are to happen, would you do so? I can look back at certain points in my life in which I made decisions that significantly altered the direction my life took. The University I selected to attend affected the relationships I formed as well as my career direction and from there on my work positions changed based on who I met and the interest I had in a specific line of work.
Now, musing on those chain of events, I need to add to everything my personality. If I were to give myself advice would I take it? Would I take advice from someone who "claims" to know the future? If I did listen, would it not change myself in the here and now and if I changed one decision it could impact other decisions or possibly eliminate situations all together?
Up until now I have only pondered decisions of which I was in control and what about events I have had no control over? Would I warn myself about negative events and in turn warn loved ones about terrible things that may happen to them? It could go on and on, I would be stuck in the past trying to prevent tragedies.
Sometimes I wish I could go back in time to eliminate horrible events or actions but I am resolved to time traveling through science fiction and letting my heroes deal with events in the past and as for myself, trying to understand the past and use that info today to the best of my ability.