There are plenty of apps to create Home screen shortcuts for contacts, but Tact by Marco Tabini is polished and easy to use.
If you want a more direct access to your contacts than what Launch Center Pro can provide, Tact presents a contact picker that you can scroll to pick one of your contacts that you want to turn into an icon shortcut. Each contact can be assigned one of four actions (Call, Message, Email, and Open) and icons can be tweaked: you can choose a color, title, and image – if having an iPhone Home screen with faces of your friends inside icons is your thing, Tact lets you do that. Technically speaking, Tact creates Home screen icons by generating webclips from Safari – unlike other apps, the process is well explained and, when launching Tact’s icons, you’ll get a nice preview image before being taken to the corresponding action in the Phone, Messages, or Mail app.