I've been making , buying, eating sushi for over 20 years now, and the only think I can say is read a lot and practice a lot if you want to make your own. Getting the rice just right was the hardest part for me, but now I can have dinner for six done in a little over 40 minutes.
Here's a page on
rice preparation.
And another on
rice.
I haven't looked at these site in a few years, so they may be dead.
http://japanesefood.about.com/librar...indexsushi.htm
http://www.sushifaq.com/
http://www.eatsushi.com/demos.asp
http://www.stickyrice.com/sushi/archives/archives.html
http://www.bento.com/tf-recp.html