One of the most common practices, planting water loving annuals (impatiens) around the base of specimen Palms, has serious often fatal consequences.
Below are links from a variety of sources that can help maintain and improve your lawn and landscape.
University of Florida IFAS Extension
South Florida Water Management : They have an excellent free publication called "Water Wise Landscaping" that you can order online
Salt Tolerance Landscape Plants for South Florida
Florida Department of Agriculture & Consumer Services