the worth of common sense

What I desperately need is a lecture on common sense, because I really lack of it, someone has first to prove that such a thing does at all exist! I mean that this not such an empty moral demand but sth. real! common sense wouzld be for me very helpful, as I really don´t want to get in conflict with society and mankind, but I always do. I totally lack of common sense. so anyone out there having a diplom in common sense please teach me out of my situation! serioooooously!