Use resources like Adam Savage's One Day Builds for inspiration on completing a project from start to finish in a single session. For Complex Puzzles:
Focus on completing just one section or "piece" of the larger work to build momentum. For Physical Builds (PC or DIY): 1.Day One
On day one, unbox and categorize all components. Having a clear view of every "piece" before you start assembly prevents mistakes later. Use resources like Adam Savage's One Day Builds