I finally got all of my major plants in the ground in my back landscape bed and my spring bulbs have also popped up, so it's time for mulch.
Mulch is important in the Florida garden because it helps conserve moisture and keep weeds to a minimum.
I decided to lay a thick layer of newspaper underneath the mulch for extra help supressing weeds. The brown stuff you see on the newspaper is composted cow manure, as suggested by The Wicked Gardener -- it helps make the newspaper less noticeable if it peeks through the mulch, and it adds nutrients for the plants to use.
I'll post a photo once I get the rest of the bed mulched (I ran out of time and supplies).