How to get a good start in stock market?

Day trading is a very tricky venture to embark upon. In order to be even marginally successful you must have the ability to remove emotions from your decision-making. This is truly the key point because day trading IS NOT investing. In fact, it can be argued that day trading is more akin to gambling with respect to the emotional aspects that become involved.
Assuming that you have the necessary equipment to really immerse yourself into to this full time: i.e. trading software, discount brokerage account, CNBC, you must also have acces to enough capital to sustain you and allow you to earn a little bit each day. The funds you use for day trading should be money you can afford to lose. It's that simple. And as with most things in life, it takes money to make money. Starting with anything less than $10,000 is not enough to get you anywhere unless you are a seasoned trading professional.
You should be spending your time getting a feel for the market. Before making that very first trade, spend some time watching the markets, try to indentify stocks that have high trading volume with a decent amount of volatility and with a price point in the $10 to $30 dollar range. Get familiar with 5 to 10 stocks that fit this profile and only trade those. Do not get distracted by other "news-making" stocks of the day because before trading them you should spend time getting to know the trading patterns and by the time you have figured that out, the opportunity will most likely be gone.
You will spend most of your day watching charts and bid/offer spreads. You will see the number of shares at various prices above and below the last trade that will give you a sense of where the trend is likely to go. In order to be successful, you need to follow the money and follow the trends. But most importantly, you need to define a trigger point for when to get out of a trade, hopefully with a profit. Keep in mind that the great traders know when to take their losses as well. That is the hard part.
There are a number of strategies that can be followed that include doing 50 trades a day for small profits or doing 5 trades a day looking for big wins. Whichever strategy is undertaken, the first thing to be done is to write down a list of trading rules for yourself and stick to them. The minute you become emotionally attached to a trade is the minute you start losing money.