How do I handle errors when using stored procedures in MySQL?

Within a stored procedure, use `DECLARE CONTINUE HANDLER FOR SQLEXCEPTION` or `DECLARE EXIT HANDLER FOR SQLEXCEPTION` to handle errors. `CONTINUE HANDLER` allows the procedure to continue execution after an error, while `EXIT HANDLER` terminates the procedure. You can also use `SIGNAL` or `RESIGNAL` to raise custom errors. Ensure proper error logging within the procedure.