Although being good and doing good, sounds as if they are pretty similar, that's mainly because they both use the word good, but they certainly are not the same thing, as there are fundamental differences between the two. To be good is often based around having attributes that are similar to kindness, courtesy, and obedience. All these things are well and good but while simply being good has its merits if that is all that you are, you will fall woefully short of fulfilling your obligation to others, which is quite simply to do good onto others. To do good for others may in fact, occasionally mean taking action in places and doing things for others that those who profess to know better, won't themselves do. For instance, look at the story of the good Samaritan, the good Samaritan is the man of action, who does not ignore a fellow man in need, and goes above and beyond in providing this robbed and hurt man, the attention and respect of dressing his wounds, of placing this stranger on his animal as to not tax him physically any further, takes this fallen man to an inn, requesting that he being taken good care of, and the Samaritan pays the innkeeper with his own money for doing so, while also making a commitment to pay more, if needed, for the injured man's care. All this is done by the Good Samaritan, out of his concern and compassion for this injured man, this is doing good at its finest level. The other two men, one a Priest, the other one a Levite, were apparently people that in their submission to the Law were being good, but in their lack of action as well as their lack of compassion, did not do good.
There are those that like that Priest, as well as that Levite, believe that simply by doing good, for instance, by not blaspheming, or by not indulging in certain fleshly lusts, or by regular attendance at places of worship and by prayer, that they have done all of the Law, or in humbler moments believe that they have done most everything of the Law, that this therefore should automatically provide them with admission into Heaven, will find out in the end to their dismay that this is not the truth. God is not deceived by appearances or by the outward display of what looks to be goodness, while God certainly appreciates all our good behavior that is not the only attribute that God knows us by. God judges us by our heart, who we really are and what we are really about, he sees the real us, and not the surface person that we try to represent to others. Listen to these true words spoken in Galatians 6:7: "Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap." We soweth in our actions towards others, the wisdom, help, and advice that we provide towards our fellow human beings, and our reactions to the tests that everyday life presents to us.
By all means be good, as that is an excellent foundation to begin from, but within that being good, recognize that you must also do good for the hungry, for the thirsty, for the stranger, for the naked, for the prisoner, and thereby ministered unto them, because by doing this unto the least, you do it also unto thy Lord himself.