Fresh mulch is the fastest way to make a yard look cared for, and in Florida it does real work too: it holds moisture through dry spells, keeps roots cooler in summer, and slows weeds.
Most homeowners choose between colored mulch (red, brown, or black), natural wood mulch, and pine straw. Colored mulch holds its look longer; natural mulch breaks down faster and feeds the soil; pine straw is light, soft, and great on slopes where heavier mulch washes away.
Aim for two to three inches deep. Thinner than that and weeds push through; much thicker and water struggles to reach the soil. Keep mulch pulled a few inches back from tree trunks, palm bases, and the house foundation to avoid rot and pests.
Before spreading new mulch, clear weeds and debris and re-cut the bed edges. That prep is what makes the finished bed look crisp instead of just covered.