Every since discovering stock photography several years ago, I find that I never create anything graphical without at least considering putting a stock photo in. Everything from baby shower invitations to backgrounds for family photo albums. Church flyers and magazine advertisements can also be improved with subtle images either as a focal point or in the background. Buy Stock Photos: Finding the right image | Stock Photo Asia is worth a read if you are thinking about stock photos.  With Fotolia's Office Ribbon you get photos and illustrations straight from Microsoft Office (requirs version 2007 or greater I think).