Jake has refined a way of doing entire design sprints in one week cycles–and he posted all about it, link here.
In general, the 5-day sprints go like this:
Before the sprint: Prepare
Get the people and things you need.
Day 1: Understand
Dig into the design problem through research, competitive review, and strategy exercises.
Day 2: Diverge
Rapidly develop as many solutions as possible.
Day 3: Decide
Choose the best ideas and hammer out a user story.
Day 4: Prototype
Build something quick and dirty that can be shown to users.
Day 5: Validate
Show the prototype to real humans (in other words, people outside your company) and learn what works and what doesn’t work. (Tips for rapid user research from Google US Research Partner Michael Margolis are here.)