Codeacademy.com
Don’t have any programming knowledge? Get some from this really intuitive (and free) online school.

Delivering Happiness by Tony Hsieh
Required reading at the RedMart office, it really demonstrates the importance of delivering a ‘wow’ experience to your customers.

Outgrow.me
This is the first online marketplace for inventions that have been successfully funded via Kickstarter or Indiegogo—a great way to check if someone’s already monetized your “great idea”.

The Social Network
The blockbuster starring Jesse Eisenberg and Justin Timberlake offers entertaining insight into the makings of a billion dollar startup, which in this case is Facebook.

Thelist.sg
Run by SGEntrepreneurs writer Kristine Lauria (krissymo.com), this is an immensely useful online calendar of events in Singapore, mostly free and tech startup related.