A few Matlab resources that I have found helpful over the years for anyone who is interested (and as a reference to myself!):

Mastering Matlab: A Comprehensive Tutorial and Reference - by Duane Hanselman and Bruce Littlefield
This book is the single best reference I have found/used. It is practically written with fairly easy-to-understand-and-apply examples, and the apendices alone with concise lists of object properties are well worth whatever purchase price you pay. I have the Mastering Matlab 5, they have since put out re-writes for Matlab 6 and 7 releases, but my copy has been helpful through the upgrades.

Using Matlab Graphics Manual - Mathworks
What? A manual that is actually helpful? Shocking but true! I have not gotten all that much from the other manuals in the series, but the graphics manual has great information about all aspects of figures. Very helpful for complicated visualizations (multi-axis, multi-layer, etc).

Generally I have avoided the Mathworks website at all costs, I find it to be terribly difficult to navigate and search, and in most cases if I can find what I am looking for, the documentation is severely lacking. However, the function list can be helpful:
http://www.mathworks.com/support/functions/alpha_list.html?sec=1

The SEA-MAT mailing list has come in handy in the past when the above resources failed me (I was looking for movie-making tips). It is a VERY slow group (I will go months with no emails at all) but when there is a question, many experienced and helpful people pop to the surface:
http://woodshole.er.usgs.gov/operations/sea-mat/mail-list.html

Please feel free to add others! Also, if you have found the secret *helpful* part of the Mathworks website, please let me know what the handshake looks like!