|By EFF (Own work) [CC-BY-3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons|
The easiest way for someone in the USA to buy a Bitcoin right now is using coinbase.com.(If you use this link to create an account and buy Bitcoin, we both get $5.00 of Bitcoin free.) You don't have to buy a full Bitcoin, you can purchase a small fraction. You just need to create an account and submit your bank account info or a Visa account. You may have to wait a few days for the Bitcoin to be deposited into your account. Once you take ownership of the Bitcoin, you can send them to an exchange or download them to your wallet or do anything you want with them.
Transferring Bitcoins to Your Wallet
To transfer the Bitcoins from the account that you bought them on to your personal storage you need a Bitcoin wallet. You can download a Bitcoin wallet to your computer or smartphone. www.MultiBit.org has a free Bitcoin wallet for computers that is secure and very popular. Once you download and install the wallet you need to find your address. Copy your address and paste it into the Bitcoin account (where you purchased the Bitcoins) in the field where you are asked to specify the address to send the Bitcoins to. Once you press send, the Bitcoins will appear in your wallet within 1 hour. Be sure to password protect (encrypt) your Bitcoin wallet. Be sure not to lose your password, if you forget your password you will NEVER be able to get your Bitcoins. Also be sure to back up your Bitcoin wallet. If your computer crashes, you do not want to lose your Bitcoins.