If you’re running Office 2013 you can make it even better by installing apps for Excel, Outlook, Project, or Word. Here’s how:
Login to Office 2013 at https://outlook.office365.com/owa and then click on the settings button in the top right corner and choose Manage apps:
Next, click on the plus sign and then Add from the Office store:
Now you can browse all of the available Office 2013 apps, and many of them are even free!