You can download free, pre-built document templates with useful and creative themes from Office when you click File > New in your Office app.

File > New

Templates can include calendars, business cards, letters, cards, brochures, newsletters, resumes, and much more. You can use any template you download as-is, or you can customize it to meet your needs.

When you select a template you'll be presented with a dialog box that shows you a larger view of the template. To download and use it, click the Create button and a new file will be created for you, using that template, all ready for you to customize with your information.

The Create button