As mentioned above it takes a lot of money, a well crafted strategy and a lot of discipline. Nothing is a "gamble". The person chooses to gamble. Winners make their own luck.
If you want to learn more about daytrading your best bet is barnes and noble. Read all the books you can find on the stock market. Eventually you will begin to think like the stock market.
If you want to practice check out www.updown.com
When you trade in the stock market, make sure you make choices based on sound financial theory, not speculation.