PHinisheD
http://www.phinished.org/
An online support group/discussion board for people trying to finish a dissertation or thesis.

Practical Advice on Starting, Drafting, and Completing Your Dissertation
http://www.unc.edu/depts/wcweb/handouts/dissertation.html
This webpage from the University of North Carolina includes some good general tips on how to get through the dissertation writing process

ThinkWell
http://ithinkwell.com.au/
Articles and resources on time management and emotional management for academics.

Turbocharging your Writing: Thesis Weekly Planner
http://ithinkwell.com.au/resources/thesis_weekly_planner.pdf
A printable document for tracking your weekly commitment to your thesis or dissertation.

Writing Productivity Problems and Solutions
http://www.stanford.edu/dept/helpcenter/Writing.html
Identifies common problems and then suggests ideas for getting past them.

The following dissertation coaches do individual consulting, but their websites also have lots of good advice, resources, and links.

Academic Ladder
http://www.academicladder.com
Gina Hiatt, Ph.D., clinical psychologist and academic career coach
Dissertation Coaching, Academic Career & Tenure Coaching

Successful Academic
http://www.successfulacademic.com
Mary McKinney, Ph.D., clinical psychologist and academic career coach
Dissertation Coaching, Academic Career & Tenure Coaching

The Dissertation Workshop
http://www.dissertationworkshop.com
Lois B. Feldman, Ph.D. and Fred Stern, Ph.D.

Dissertation Diva
http://www.dissertationdiva.com
Liena Vayzman, Ph.D.—holistic dissertation and creativity coach

ASGS: Association for Support of Graduate Students -- Professional Consultants Directory
http://www.asgs.org/cons_lst.html

Ben Dean, Ph.D., MentorCoach
http://www.abdsurvivalguide.com
http://www.mentorcoach.com

All But Dissertation Survival Guide
http://www.abdsurvivalguide.com/
Advice for dissertating students, including an e-mail subscription.