A handful of good books
A network of intelligent, contentious friends
A job (just about any job)
Daily blogging for 30 days
Five good podcasts
Daily exercise
Quora
Amazon book reviews (writing or reading them)
Signing up for the email workflows for every company you like
A few weeks in a different country
Cold call sales
Building something from scratch
Running a marathon
A FEE seminar
Brainpickings.com
Breakingsmart.com
Creating a website
Making $500 on eBay
Interviewing people for a podcast
Season one of Silicon Valley
Giving three talks in front of a crowd
The Wire
Starting a business and failing
Starting a business and succeeding
Playing in a band and getting paid gigs
A cross-country road-trip
Writing a book
Being debt-free
Having some cash on hand and a low cost of living
Being interested and interesting
A good salami sandwich