This is an infographic I made for Cinema Blend detailing the 5 dream levels of Inception. If you haven't seen the movie yet, I recommend not reading this because it will probably spoil a great movie for you.
I did the artwork and Cinema Blend's Josh Tyler did the text. You can read the full article at this link:[link]
Also a little disclaimer based on some comments I've read elsewhere:
This explanation is based on Cinema Blend's interpretation of the movie. Nobody is trying to tell you this is the definitive explanation of the movie, just our own. Please don't get upset if this doesn't fit with your thoughts on the movie, part of what makes Inception so great is that different people can leave with different thoughts and then go and discuss their theories after seeing the film. That's part of the fun.