Download and install the itunes software available at the Apple Web site, or visit amazon.com and browse their digital-download section. Many other online music stores, such as eMusic.com and mp3.com, also offer the latest hits as well as older selections.
Set up your account with itunes by adding a payment method. You can use a credit card, PayPal, or an itunes card with a preset spending limit to pay for your selections. At Amazon, you can simply use your credit card or a gift card.
Search for the song or album you are looking for in the search box. Songs cost 69 cents, 99 cents $1.29, depending on their popularity. Some retailers like emusic.com sell songs for as little as 50 cents.
Visit amazon.com or eMusic.com and search for any music that you were not able to find at itunes. Although itunes is the most popular Web site for music purchases, there are alternatives. At amazon.com, you can download songs or albums or buy CDs.
Buy your favorite single or album at your local record store or at a retailer such as Best Buy, FYE, or Walmart. Although their selection pales in comparison to an online music store, some people are more comfortable with buying actual CDs rather than digital music.