Inspecting the rigging visually regularly is a strategy to curb any failures in it. Some of the pointers you should look out for include terminals and swages that have rust, corrosion, or powdery residues around them.
Run your fingers along the wire, feeling for deformities that indicate broken strands. It might be wise to do non-destructive testing or dye surveys for a more extensive review, especially if your rigging is near its design life.