What?
[this is the description & self-awareness level. All questions start with the word what e.g. What happened? What did I do? What was I trying to achieve? What was good/bad about the situation?]
So what?
[this is the level of analysis and evaluation. All questions start with the phrase so what? e.g. So what is the importance of this? So what more do I need to know about this? So what have I learnt about this?]
Now what?
[this is the level of synthesis. All questions start with the phrase now what? e.g. now what could/should I do? Now what do I need to do? Now what might be the consequences of this action?]