You can easily paste your charts from Excel into your Word documents.

1. Select the chart in Excel that you wish to embed into your Word document.
2.  Press Ctrl-C to copy the chart on to your computer clip board
3. Open your Word document.
4. Place the insertion point in the place you want to place you chart.
   In verison of Word prior to 2007, click Edit on the menu bar and then Paste Sepcial. In Word 2007 display the Home tab of the ribbon, click the down arrow under the Paste tool, and then choose Paste Special. 
5.  Select the Microsoft Excel Chart Object as the preferred method of pasting. This term may vary depending on the version of Word you are using.
6. Make sure the Paste Link radio button is selected. 
7.  Click on OK. Word inserts the linked chart in your document.

Thanks to Word.tips.net for providing this tip.