There are two certainties when it comes to business/motivation/management blogs.
1. 99% of them suck.
2. Trizle single-handedly makes up for the other 99%.
We first discovered Trizle about a year and a half ago and it is the one sure thing that gets read all of the time. They've also recently launched a simple task-list app called Chikolo which is simple and easy to use (but needs an edit task function added), and published a little business guide called Trizle's Lil' Guide to Rock Your Business.
Check them out http://learn.trizle.com/archives. do it do it do it!
