A few of my favorite websites, arranged alphabetically:
Awesome advice for organizing your life
An essential resource for anyone wanting to be a web designer
Daily astronomical picture; I have many desktop pix from this site
Create presentations that don't look like they came from PowerPoint Hell
Resource for file sharing and project collaboration
Life and executive coach training for mental health professionals
Great site for low-cost stock photography and clip art
The service I use for continuous online backup of critical data
Adobe color scheme sharing site - like Youtube for designers
Where I get my daily Mac news and rumors fix
Designers of RapidWeaver, the software used to create this site
Sort of the LinkedIn for the personal development community
Must read blog for the entrepreneur/small business owner
Daily summary of space and astronomy related news
The place for entrepreneurs to connect
Best implementation on the Mac of Getting Things Done
Extensive free tutorials on all aspects of web design