Sporadic Rambling?

I can say without trepidation that I often spend too much time thinking about what other people think instead of thinking about what I know. I say this to mean that no other person should be the definitive authority when it comes to me defining myself and my existence in context to the world around me. I heard Lebron James say, and I'm sure he heard it somewhere else or his wisdom is profound for his age that, what we do in life echoes throughout eternity. My life has meaning and the ramifications of that meaning will reverberate in the physical as well as the spiritual. I believe that my spirit will join God in heaven when my time here on earth has come to an end. The question I ask myself is the impact that I will have while I am here. How will I leave my mark? What will I do that is of enough effect to last when I no longer occupy my physical body? I figured that the first place for me to start is to give of myself for the betterment of those that are around me. I also thought that it would be good to live for the moment, plan for the latter, but refrain from the fear of tomorrow - as the good book says, it isn't promised, thus the importance of understanding the relevance of today.