Installing Zotero - Help with Installation Instructions and a direct link to the downloads page.
Quick Start Guide - Gives you the basics.
FAQs - Frequently given answers.
Screencast Tutorials - A handy collection of some of the best video tutorials out there.
Getting Stuff into your Library. Instructions for both adding items and for adding files.
Organizing your library - Have personal control with collections and tags.
Generating Bibliographies. How to create bibliographies in a number of different ways.
Syncing. Using your online space and working in groups.
Zotero on Mobile. Yes, Zotero Mobile can be used on iOS, Apple, and some other mobile devices. Woot!