In addition to knowledge of basic trading procedures, day traders need to keep up on the latest stock market news and events that affect stocks—the Fed's interest rate plans, the economic outlook, etc. So do your homework. Make a wish list of stocks you'd like to trade and keep yourself informed about the selected companies and general markets. Scan business news and visit reliable financial websites. 
But building a diversified portfolio of individual stocks takes a lot of time, patience and research. The alternative is a mutual fund, the aforementioned ETF or an index fund. These hold a basket of investments, so you’re automatically diversified. An S&P 500 ETF, for example, would aim to mirror the performance of the S&P 500 by investing in the 500 companies in that index.
How much money should I invest in stocks? If you’re investing through funds — have we mentioned this is our preference? — you can allocate a fairly large portion of your portfolio toward stock funds, especially if you have a long time horizon. A 30-year-old investing for retirement might have 80% of his or her portfolio in stock funds; the rest would be in bond funds. Individual stocks are another story. We’d recommend keeping these to 10% or less of your investment portfolio.
This is an excellent learning experience and one that is vital to the long-term profitability of anyone in the stock market. To get the real experience, purchase some graph paper and chart the stock price movements each day by hand. Learn to compare this with the overall movements of the equity market or index and a whole new world of investment and money will begin to open up to you!

While that may sound like outdated advice, in late 2012, an American marketing executive explained how he had turned $20,000 into $2 million during the recession. Chris Camillo explained that Wall Street is quite homogenous and tends to be behind the curve on trends involving females, young people and those on low incomes. Camillo invested in stocks that anyone could have, he just spotted trends before the investment bankers did and was able to make some very sizable profits. 

Investing in stocks can be done in many ways. If you would like to form a strategy and manage your own investments, you can open a brokerage account. If you're unsure about where to start, consider opening an account with a robo advisor who will do the work at a lower cost. For those who want more guidance about their retirement plans, turning to financial advisors might be a good solution.
Competition has spurred many brokerages to slash commission fees, which can add up quickly if you buy and sell stocks, mutual funds or ETFs frequently. Robinhood is not the only company that does not charge commission fees. Starting in October, Interactive Brokers is providing an unlimited number of commission-free trades on U.S. exchange-traded stocks and ETFs along with no account minimums or inactivity fees.
Blue-chip stocks are popular because they typically have a decades-long track record for earning. "Blue chips" derived their name from Poker, where the most valuable playing chip color is blue. Shareholders like them because they tend to grow dividend rates faster than the rate of inflation meaning the owner increases income without having to buy another share. Blue-chip stocks are not flashy, but they have solid balance sheets and steady returns.
In the professional world, one of the key concepts is diversification. Harry Markowitz is a Nobel prize winning economist and one of his major discoveries was that adding new asset classes can dramatically alter the overall risk profile of a portfolio. His finding was that a portfolio that contained very low risk assets would normally benefit from lower volatility and higher returns if a higher risk asset was added. This is due to the likely lack of correlation between high and low risk asset classes.

Why I’m buying: Spell out what you find attractive about the company and the opportunity you see for the future. What are your expectations? What metrics matter most and what milestones will you use to judge the company’s progress? Catalog the potential pitfalls and mark which ones would be game-changers and which would be signs of a temporary setback.