Mind Hacks is the blog of authors Tom Stafford and Matt Webb who have written a book by the same name. It is a fascinating look at "neuroscience and psychology tricks to find out what is going on inside your brain, with a view to understanding ourselves a little better and learning a little more, in a very real sense, about what makes us tick".
I really enjoyed this site as it had lots of interesting links to really get your brain working. Some examples of the topics covered are; the power of praise, memory, eliminative materialism (!) and folk psychology, treatment for a new mental illness and all about "extra senses".