It is always difficult to remember the syntax of APIs. This is where cheat sheets come in handy.
These are three jQuery cheat sheets that I found on the web:
Future Colors.ru jQuery 1.4 cheatsheet
(by Future-Colors.ru)
Impulsestudios.ca jQuery 1.4 cheatsheet
(by Impulsestudios.ca)
Woorkup.com jQuery 1.3 cheatsheet
(by Woorkup.com)