Businesses you don't understand -- Here's a great rule of thumb that works for beginners and expert investors alike. If you can't clearly explain what a company does and how it makes money in a sentence or two, don't invest in it. There are literally thousands of publicly traded companies to choose from, and you should be able to find plenty of opportunities in easy-to-understand businesses.
Thirty-two percent of Americans who were invested in the stock market during at least one of the last five financial downturns pulled some or all of their money out of the market. That’s according to a NerdWallet-commissioned survey, which was conducted online by The Harris Poll of more than 2,000 U.S. adults, among whom over 700 were invested in the stock market during at least one of the past five financial downturns, in June 2018. The survey also found that 28% of Americans would not keep their money in the stock market if there were a crash today.
You can buy stock directly using a brokerage account or app. Other options exist for those who are employed—either a 401k plan or a 403b plan if you work for a non-profit. Then there's the IRA—be it a Traditional IRA, Roth IRA, Simple IRA, or SEP-IRA account. You can also set up a direct stock purchase plan or dividend reinvestment plan (DRIP). Each type of account has different tax implications.
The least demanding way to invest in the stock market is to invest through a fund. There are two types of funds. First is the actively managed mutual funds which have higher fees—92% of these funds fail to beat the underlying index over any three-year period. The second type is the index tracking fund, which typically has lower costs and is more effective in matching the growth of the stock market. This means they are growing in popularity because of the higher return on investment you receive. You should also use the most tax efficient way to invest: using your Investment Retirement Account (IRA) first. It’s best to invest in a low-cost, index-tracking fund through your tax-free IRA.

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.
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.