Adding weight to a lure can improve its casting distance and sink rate. You can add weight by using split shot sinkers or by attaching a weighted bead or jig head. Another option is to wrap lead wire around the shank of the hook or use weighted treble hooks. Be cautious not to add too much weight, as it may affect the lure's action. Experiment with different weights and placements to achieve your desired fishing conditions. By increasing the weight of your lure, you can enhance its performance and attract fish more effectively.