You might check out "A Beginner's guide to Day Trading Online... 2nd Edition by Toni Turner... decent and has quizes to test what you have learned throughout the book. Yes, sometimes tests are actually a good thing.
Open a demo trading account and sit in front of the computer and trade if you want to learn how to trade. You'll thank me later.
A couple of suggestions: take is slow in the beginning. Watch the market for months while experimenting in a paper account and reading. Here is one book that I found useful. It's more about what profitable trading "looks like", than day trading. Don't let the title turn you off. http://www.amazon.com/Trade-Your-Wa...=sr_1_1?ie=UTF8&s=books&qid=1251219145&sr=1-1 Remember that trading is a game of probabilities; the sooner you accept that, the sooner you have a chance of success. There is no magic "one thing to do".
If you are a total newbie,you can probably read this book so you can realize common trading mistakes you do : http://www.amazon.com/Winning-Day-Trading-Game-Techniques/dp/0471738239 Its written by Tom Busby. I was however disappointed as it doesn't talk too much on techniques which new traders must focus on developing to get an edge. Most of the book was advertising for author's seminars/training/software. Covers most basic concepts but if you are looking to buy,buy used(the reviews on Amazon in my opinion are way way hyped to give this book 4/5 stars). Just my 2 cents.
Mastering the Trade by John Carter is probably the best for a new guy. Am I John Carter follower? Nope Do I think you will make easy money after reading it? Nope Do I think reading a book replaces hours and hours of actual experience? Nope I recommend it because it has good details about many various setups with entries/exits/money management. If you sit in front of a screen and start staring at prices without context, that won't help you. You need to read and learn price action with certain concepts in mind - ie, you need to anchor your beliefs. Keep trading. JScott