Should I Become an Entrepreneur? – Jeffrey Bussgang – Harvard Business Review: “When to become an entrepreneur is a common quandary for many. For whatever reason, this issue has come up a great deal recently (recession-driven workforce dislocation?), so I thought I’d share a few thoughts that might help frame this critical decision.” Read more.

These post on Bootstrapper’s Lab can be helpful as well:
A 2–minute Isenberg Entrepreneur Test.
Five Bad Reasons To Become An Entrepreneur via
101 Tips from 50 small business bloggers.
Starting a new business while still employed.
Change This: Bootstrapper’s Bible by Seth Godin.

Following entrepreneur blogs can be helpful, motivating and inspiring for start up entrepreneurs (or managers). You can find many lists around the internet. Here are a few of them:
The Top 10 Entrepreneurs Blogs You Must Read |
15 Entrepreneur Blogs Worth Reading | Wall Street Journal
Top 10 Most Practical Blogs for Entrepreneurs |
I often find the HBR blog network very useful: Business Management Ideas – Harvard Business Review Blogs.