1. Pick the index that you want to track.
2. Choose a fund that tracks your selected index.
3. Buy shares of that index fund.

There are hundreds of different indexes you can track using index funds. The most popular index is the S&P 500 Index

Here's a short list of some additional top indexes, broken down by what part of the market they cover:

• Large U.S. stocks: S&P 500, Dow Jones Industrial Average, Nasdaq Composite
• Small U.S. stocks: Russell 2000, S&P SmallCap 600
• International stocks: MSCI EAFE, MSCI Emerging Markets
• Bonds: Bloomberg Barclays Global Aggregate Bond

In addition to these broad indexes, you can find sector indexes, country indexes & so on

Once you've chosen an index, you can generally find at least one index fund that tracks it. For popular indexes like the S&P 500, you might have a dozen or more choices all tracking the same index.

If you have more than one index fund option for your chosen index, you'll want to ask some basic questions:

1. Which index fund most closely tracks the performance of the index?
2. Which index fund has the lowest costs?
3. Are there any limitations or restrictions on an index fund that prevent you from investing in it?
4. Dowa the fund provider have other index funds that you're also interested in using?

To buy shares in your chosen index fund, you can typically open an account directly with the mutual fund company that offers the fund. Alternatively, you can open a brokerage account with a broker that allows you to buy and sell shares of the index fund you're interested in.

Again, in deciding which way is best for you to buy shares of your index fund, it pays to look at costs and features. Some brokers charge extra for their customers to buy index fund shares, making it cheaper to go directly through the index fund company to open a fund account.

1. Minimize your time spent researching individual stocks. 
2. You can invest with less risk. 
3. Index funds are available for a wide variety of investments. You can buy stock index funds and bond index funds.
4. It's a lot less expensive. 
5. You'll pay less in taxes.
6. It's a lot easier to stick with your investing plan. When you use index funds, you can automatically invest month after month and ignore short-term ups and down

1. You'll never beat the market. 
2. You don't have any loss protection.
3. You won't always own stocks you like.