Go to a grocery store, pharmacy, electronics store such as Best Buy or a general merchandise store such as Wal-Mart, Target or K-Mart. Most of these stores will have racks of gift cards ranging in denomination from $5 to $100.
Select the iTunes card that represents the denomination you want to purchase. Choices will likely include $15, $25 and $50.
Purchase the card at no additional cost besides any applicable taxes.
Go to Apple.com/itunes and click on "Buy now" below the heading "Redeem your iTunes Gift Cards Here" on the right side of the page.
Choose the gift card denomination you want to purchase. Choices include $15, $25 and $50 denominations as well as different card designs.
Personalize your iTunes card, send a message if you are giving it as a gift and click "Add to Cart."
Click "Check Out Now" when you are done selecting the cards you want to purchase.
Enter your account information or create an account. This will enable you to enter your credit or debit card information along with the shipping address to which you want the card to be sent.