One of my favorite tools in MS Word is the Format Painter button.  I use it all the time!  The Format Painter button is located in the Clipboard section of the Home tab.

What it does:

Format Painter will copy formatting (i.e. text size, color, bold, italicizes, etc.) from specific portions of your document and apply it to other portions of your document with a few clicks.

How to use it:

1. Using your mouse, highlight the portion of your document containing the formatting you would like to apply.
2. Click the Format Painter button
3. Using your mouse, highlight the portion of your document where you would like to apply the formatting.

Word will apply the formatting to your document. The Format Painter is then deactivated, so if you select another part of your document, the formatting will not be applied again.