Almost every foreign text book I've seen mentions 您 as a polite or formal address to others, however I rarely hear it said and rarely see it written except when addressing customers and occasionally ...
I've read that when asked the simple question 你好吗？ ("how are you?"), answering 我很好 is the standard form, while 我好 is simply not used. 很 means "very", but 我很好 is simply translated as "I'm fine." and ...