Here's how you can add a contact shortcut to your Nexus 7 home screen. This will save you time if you need to access that contact frequently.
1. Find an open space on your Nexus 7 home screen.
2. Open the Widgets window.
3. Press and hold your contact entry.
4. Find the contact in your list, then tap on the entry for that person.
Now you can quickly reach your contact right from your Nexus 7 home screen.
Read more: CNet