Here are some of the resources I use daily and also recommend.
Entrepreneurship
A smart bear – Jason Cohen’s blog about marketing and small business.
Feld Thoughts - Brad Feld, managing director at Foundry Group, VC.
A VC - Fred Wilson is a VC and principal of Union Square Ventures.
Mark Suster - 2x entrepreneur who has gone to the Dark Side of VC.
Supply Chain Management
Sales & Operations Planning – Always start on Wikipedia :)
Integrated Business Planning -
WordPress
WordPress - the CMS that this site runs on.
Genesis theme framework - WordPress theme framework that rules them all.
_s starter theme - WordPress started theme used by Automattic (the creators of WordPress).