These three are going to seem entirely random, but...
One that I enjoy is Study Hacks http://calnewport.com/blog/. I'm usually taking some class or other in the quest to continually improve myself and strengthen my job skills, but I'm kind of a mediocre, unmotivated student. Study Hacks explores methods for staying on top of your workload and getting the job done, but toward the end of being able to live a "remarkable life" which is balanced and accommodates interests outside of one's career.
There's another one that I like called fear.less http://fearlessstories.com/blog/, which is comprised of stories of successful people's strategies for conquering their fears. This one seems to be in the nascent stages and could use more development, but I love the concept. When it comes to strategies for conquering fear, I'll take all the help I can get!
And finally, there is Yes and Yes, http://www.yesandyes.org/ which I simply love for Sarah Von's optimistic outlook and its motley mix of topics--everything from travel to true stories profiling folks who have been challenged by some extraordinary circumstance to tips for getting over a breakup or getting through a challenging academic semester or simply redecorating a room. I find this blog truly endearing. Once on a particularly depressing day, I was browsing through a list of things to make you smile and came across Sarah's link to Maru the Cat on YouTube http://www.youtube.com/watch?v.....r_embedded. Needless to say, she (and Maru) succeeded in making me smile!