Even though I have pre-ordered the Lean Startup book in 2011, and started reading the first few pages in 2013, I have actually never finished it. So recently — as a usual Late Adopter — I have started studying the methodology. And I instantly fell in love with it.
Here are some essentials if you want to get started with Lean Startup — or get a refresher.
Great talks by Eric Ries (you can find more here):
Great case study of how to validate a business idea in 24 Hours instead of 6 Months:
Lean Canvas — Capture your Business Model in 20 Minutes
In case you get excited (like I did), I highly recommend the videos of the Lean Startup Conferences