Great personal development sites and articles

I've been doing some research to develop a tool for setting, managing and tracking progress against personal goals based on various techniques seen in personal development books and articles and in the process have been compiling a list of useful websites.

Below is a list of some of the more useful sites I've come across so far, with a focus on goal setting and objectives (in no particular order)...

http://www.goalsguy.com/Knowledge/index.html

http://www.constraintmanagement.co.uk/Personal_Focus.htm

http://www.completepersonaldevelopment.com

http://jobsearch.about.com/od/careeradvice/a/worklife.htm

http://www.maximumbalance.com/community/node/344

http://www.trans4mind.com/positive/

http://www.jackson-pdc.co.uk/resources.html

http://www.stevepavlina.com/

http://www.lifehack.org/

http://www.stevenaitchison.co.uk/blog/2007/08/15/22-of-the-best-motivational-videos-online-free/