Where do i look for decorating ideas, e.g. floral arrangements, ribbons for a ribbon cutting ceremony?

You should contact a local florist. Many of them are part of the FTD or 1800 flowers groups. These associations often have books given out to florists of the various floral arrangements that are regularly sold (and which each florist can replicate).

Where do i look for decorating ideas, e.g. floral arrangements, ribbons for a ribbon cutting ceremony?
i would suggest going to dollar tree..i like the one in walnut creek.