This site offers video tutorials for SL in MP4 and FLV formats.
The BasicsThe site also recommends the following:
One of the best places to go to learn how to Do It Yourself is Natalia Zelmanov's Second Life Diary for: shoes, Flexi Skirts, Flexi Hair, Fur, Satin, Shirts, Ties, etc
This is the tutorial link page
An excellent primary resource...
It looks like Suny Buffalo is giving its professors suits to wear and the option to make their own professional SL clothing. :-)