Normally, at the beginning of a conversation, it's not really a question about how your life is going, it's simply a form of politeness. That's why the answers are so limited. If an English speaker REALLY wants to know how you are, they will ask a second time later in the conversation. But then they expect a real answer! To be more creative with the polite question, however, you can work in what you are doing into your answer, such as... How am I? I'm on my way to lunch, and once I've eaten, I'll be much better, thanks! or Since the sun is out and it's warmer, I'm doing great! How are you? or I stubbed my toe this morning and now I'm limping through the day. How are you?

You can answer: 1,I'm really good,thank you. 2,I'm doing well,thanks. 3,Not much, the usual really.

You can answer: 1,I'm really good,thank you. 2,I'm doing well,thanks. 3,Not much, the usual really.