Paula got a Google Nexus 7 tablet for her birthday. She wants to know how to sync contacts from her smartphone to her Nexus 7 and Windows. Leo says that Google is her friend. She should just go to contacts.google.com and calendar.google.com and she'll see that the phones and tablet automatically sync those.
As for the PC, using Google means she doesn't need to worry about a separate application for everything, Google handles it all. She can just let the browser do all the work. For sending email, if she wants to use Windows Live, she can connect Google accounts to it and automatically import it. She can find this in the settings.