It's important to stay on top of things. I enjoy reading these blogs and I'm pretty busy. I consistently read these 2 and find them worth the time.
I do subscribe to a lot of other stuff in Google Reader and click through it pretty quickly - alerts on branding, major brand blogs, etc. - to make sure I know what is happening. I also read what's happening on Twitter.
See what you think --
1. Dan Schawbel's personal branding blog
This blog regularly features articles by guest columnists and news about new brand-related developments. All useful to your personal brand and to understanding branding in general.
2. Penelope Trunk
Penelope Trunk is simply the best writer out there, period. She goes to the edge. From a branding and marketing perspective she has an uncanny ability to let you into her world while still keeping you at the necessary distance. Brilliant strategy and brilliant writing. Scary at times, but brilliant.
Another great resource is LinkedIn, which has a variety of brand-related discussion groups.
I keep a list of bookmarks at my blog too: http://thinkbrandfirst.blogspot.com.
If you have a resource to suggest, please comment.
Have a great day!