If you are not making mistakes, than you are not doing anything.  Don’t let the fear of making a mistake stop you from doing something.  There are very few mistakes that cannot be overcome; go ahead and make that decision and see where it leads.  If it leads to something you wanted, that is good.  If it leads to something you didn’t want, that could also be good.  Finding what you don’t want helps you figure out what you do want, so it might be argued that the mistake that brought you what you don’t want also brought you closer to the knowledge of what you do want – that’s a good thing.  So don’t fear mistakes, embrace them!