Indeed. Lean is about constantly eliminating waste, i.e. spending as much as possible of your effort on things that will truly take you closer to profitability.

Indeed. Lean is about constantly eliminating waste, i.e. spending as much as possible of your effort on things that will truly take you closer to profitability. A lot of things that look like work are actually not earning you any money, just costing you valuable life-hours. The Lean Startup contains some tips for figuring out which is which.