SAT test is governed by College Board. SAT refers to Scholastic Assessment Test but it was Scholastic Aptitude Test before.

The duration of SAT test will be of four hours. It costs US Dollar 68 to take this test.

You can find online SAT Study Guide at official SAT website:
http://www.collegeboard.com/student/testing/sat/prep_one/prep_one.html. You can practice for your SAT Test there.

There are three sections in SAT:
1. Critical Reading Section
2. Quantitative Section and
3. Writing Section

Detail scoring pattern for SAT is available at
http://www.abroadeducation.com.np/test-preparation/sat/score-pattern.html

For sample questions and online practice, I found this website good:
http://www.testprepreview.com/sat_practice.htm

Ok, practice well for your test.

I found detail SAT Study Guide book on wikibook. I think this book will help you understand structures of SAT. You can also prepare yourself for SAT test using this e-book published at WikiBooks. I've mentioned a link to that book below:
http://en.wikibooks.org/wiki/SAT_Study_Guide

You better use SAT guide books for SAT practice. I've listed some popular books for SAT practice.

The Princeton: Review, Cracking the SAT, 2008
Price: $15

Kaplan SAT Premier Program
Price: $20

Peterson's Master the Sat 2008
Price: $25

The Official SAT Study Guide
Price: $15

The prices I've mentioned may not be same in all stores. Practice better for SAT with any of these books.

I found SAT Study Guide in PDF format. Download it from here:
http://www.studyguidezone.com/pdfs/satteststudyguide.pdf

You may also find SAT study guide from collegeboard's official website:
http://store.collegeboard.com/productdetail.do?Itemkey=007182

Here is the list of SAT Study Guides. But these aren't the online guides.

CliffsNotes Study Guides
For Dummies Study Guides
Barron's Study Guides
The College Board Study Guides
Wiley Study Guides

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