When you buy a stock, you should have a good reason for doing so and an expectation of what the price will do if the reason is valid. At the same time, you should establish the point at which you will liquidate your holdings, especially if your reason is proven invalid or if the stock doesn’t react as expected when your expectation has been met. In other words, have an exit strategy before you buy the security and execute that strategy unemotionally.

It is also worth trying to keep up to date with the latest thinking related to the area of investment that you are trying to specialise in. Therefore, if you plan to invest in defensive or income stocks, for example, it would be wise to read regularly about value investing and dividends. If you plan to invest in growth stocks, it would be wise to read about technology and the latest trends. Perhaps you could subscribe to one or more trade publications that relate to the sector(s) that you are most interested in.

Remember that free stock picks usually exist because of the vested interests of the company or the promoter. There are some exceptions, such as in the case of top book publishers, like John Wiley & Sons, who produce works like, "Penny Stocks for Dummies." Their exhaustive vetting process alone is usually thorough enough to provide you with some serious confidence in who they choose.

Choosing the right stock can be a fool's errand, but investing in high-quality stocks such as blue chips and dividend-yielding ones are often good strategies. One reason investors opt for blue chips is because of the potential for growth and stability and because they produce dividends - these include companies such as Microsoft (ticker: MSFT), Coca-Cola Co. (KO) and Procter & Gamble Co. (PG). Coco-Cola, for example, generates a dividend of 2.9%, and the stock is less volatile as its share price has hovered between $44 and $55 during the past 52 weeks. Dividends can generate much-needed income for investors, especially higher-dividend ones.
The Over-the-Counter Bulletin Board (OTCBB): This is owned by the NASDAQ, and as such has listing fees, standards, and reporting requirements. The companies trading upon it have a responsibility to provide the shareholders (you) with timely financial documentation. Higher-quality penny stocks list here when they are just shy of attaining the status that comes with the NASDAQ or NYSE.

Finally, keep in mind that if trading on margin—which means you're borrowing your investment funds from a brokerage firm (and bear in mind that margin requirements for day trading are high)—you're far more vulnerable to sharp price movements. Margin helps to amplify the trading results not just of profits, but of losses as well if a trade goes against you. Therefore, using stop losses is crucial when day trading on margin.
In most cases, your broker will charge a commission every time that you trade stock, either through buying or selling. Trading fees range from the low end of $2 per trade but can be as high as $10 for some discount brokers. Some brokers charge no trade commissions at all, but they make up for it in other ways. There are no charitable organizations running brokerage services.
Dollar-cost average: This sounds complicated, but it’s not. Dollar-cost averaging means investing a set amount of money at regular intervals, such as once per week or month. That set amount buys more shares when the stock price goes down and fewer shares when it rises, but overall, it evens out the average price you pay. Some online brokerage firms let investors set up an automated investing schedule.