1. Copy and Paste method:  https://support.google.com/docs/bin/answer.py?hl=en&answer=1409533
   Advantages: 
   + fewer steps
   + no need to save an image to your computer
2. Adding Chart Images: http://support.google.com/docs/bin/answer.py?hl=en&answer=63834 
   Advantage:
   + once the image is saved onto the computer, it  can be manipulated to add other appropriate images to the chart 

Open Office:

1. Saving the chart as an image, then inserting the image.  Just like #2 from Google Docs above.
2. Insert | Object | Chart ...
   Allows to create a chart right in the writer document. The specific data must be changed to required data.
3. Insert | Object | OLE Object ... |
   At this point there is the option to create a new chart OR one from a file.
   If a chart is created from a file, there is an option to link the chart to the file. This way as the data in the spreadsheet changes, so does the data in the writer document.