Sometimes I think Office Online is one of Microsoft's best kept secrets. Sure, most people have used a help link at some point or other, but the wide range of additional resources that you can find on the site is usually overlooked.
Take templates. Increasingly the different Microsoft Office products are coming with a stack of templates, but you can always get more from Office Online. I had a look around for PowerPoint themes and the "Design Slides" were a terrific repository of different looks - great both to use directly and for inspiration for your own designs.
Here are a few of my favourites!
|Classic photo album
||Photo journal design template
|Employee orientation presentation
||Fireworks design template