If you can, please consider visiting one of the cemeteries from the list maintained by the VA:
http://www.cem.va.gov/cems/listcem.asp
Take a few flowers and find the grave of a veteran who may not be remembered - often due to location or similar.
Place a flower on the grave and thank them for their service to their country, their family, your family and you.
Repeat as necessary.
Find any uniformed personnel that you can and, if appropriate and not intruding, shake their hand and thank them.