If you're like me and enjoy thinking about thinking - and thinking of ways to improve your thinking - then I highly recommend Luciano Passuello's Litemind site.
The site has a simple mission:
To explore ways to use our minds efficiently.
The site is full of information on creativity skills, memory skills (including such methods as the Major system and Roman Room system), self improvement strategies, and Mind Maps on well-known books (such as The Medici Effect). There are also some wise words on overcoming "the dreaded P" - procrastination!
I can't recommend this blog highly enough.