User Onboarding
User Onboarding is the process of radically increasing the likelihood that new users become successful when adopting your product.
Thinking about a redesign? Do this first
Before changing your onboarding, capture it in detail
Teardowns
Let's learn some lessons from how popular web apps do it!
Here's the latest:
And here are some other recent ones:
QuickBooks 
Bitcoin 
Dropbox