Using Metamask when buying EOS tokens will give you a nice user friendly interface like this...
Metamask is a Chrome Extension Wallet!
Fund your Metamask just like any Etherium Wallet and you are good to go. Just click the "EOS TOKEN DISTRIBUTION APP" shown in the image below.
The best thing in using this interface is you can easily generate and register your EOS public key which is required when the whole ICO distribution ends...