Alex Ikonn and UJ Ramdas together created an essentially blank booklet with pre-formatted pages to be used as a daily journal.  The 5 minute journal was born when UJ and Alex were walking in a park talking about their morning and evening routines.  Basically UJ wrote a journal in a short format every night before going to sleep.  Both of them recognized the chance to develop this idea into a tangible (physical) product and sell it online.  They even developed and IOS app.

The journal is a 268 page hardcover book available at fiveminutejournal.com .

Once the journal got recommended by Tim Ferriss it apparently sold out on amazon.com.