Not every product idea needs to be built from scratch!
Use existing tools, platforms and services to hack a product together and test your hypothesis.
Want to build a crowd sourced comparison engine, start with Facebook polls and google forms!
Want to build events listing website, start with google calendar!
Lean is good, learn how to get leaner. This starts with identifying the "real" problem and crafting out clear hypothesis statements.
The goal of building lean prototypes is to test the viability of your solution. It is not about engagement or experience design, primarily. A good product is one that solves a valid problem and is a sustainable business.
Learn how to identify the correct problems, craft clear hypothesis statements and how to use existing tools and services to hack your MVP without spending effort on developing and designing.