I always think twice or thrice before taking any decisions that affect my life. So, I can say for sure that I have not made any worst decision in my life. Whenever I take a decision, I also consider about the future complications of my decision. If we think in this way, we are able to avoid taking worst decisions.
Having said that, one may ask whether all my decisions were good. To such a question I will say no. It is because when we decide to do something based on our rational thinking, sometimes, it may turnout good and at other times it may turn out not so good. In both the situations we have to face the consequences.