Thankfully my lies at that age were innocuous enough that no real harm or damage had been done except the few around me who were irritated by my lies and angry at me for telling the lies. I learned early on that lies have a life of their own not to be controlled after they are let loose into reality. I could not sustain them and then spent many days apologizing, eating crow and being shamed for how I tried to deceive. From those days on I find it difficult to lie regardless of the penalty. Now I have lied since then and lived with my guilt but the times I did were real moments of weakness that in hindsight were perfect examples of my own inability to have a structure to follow, instead of just relying on my own willpower. However, even though those few times are far behind me and although I had tripped a time or two since I was young, I have not forgotten the lesson I learned as a child.
The thing about lies is that since they are not truths, they tend to fade from my memory unlike truths. I can remember truths easily but lies are very hard to remember. So given that, no matter what the advantage gained through lying it is not worth the guilt nor the lowering of my self esteem. So in order to not be tempted by lying, I find that doing good and the right thing keeps me from the lying dynamic. So in order not to lie, I do good. It seems like I learned my lesson well and for the most part have done well to make truth telling a conscious and subconscious reality in my life.