Tools for career skills

The other day I was browsing the web and landed on http://www.mindtools.com. There is a toolkit tab on the top menu and if you click that you will see various topics on the left. These are interesting topics - at least to me. Have to read in detail to see what they say. They also have an iPhone app. As I browse through these I get a feeling that these could serve as a good intro to each topic and one has to dive deep based on individual's interest.
Again I am in now way connected to Mind Tools and their products.