You can put your mergefields wherever you like in the mailmerge main document, multiple times, if you wish. Instead of having DATE and SALUTAIONM in the document, though, you'd insert mergefields at those locations, referencing your column headings in Excel.
FWIW, you post suggests you need to spend a bit more time learning how mailmerge works. See:
http://office.microsoft.com/en-us/wo...001034920.aspx
http://support.microsoft.com/kb/294683
http://office.microsoft.com/en-us/wo...101857701.aspx
http://word.mvps.org/FAQs/MailMerge/...AMailMerge.htm