respectfully / respectively
With respect versus in the order named.
Respectfully means with respect: Respectfully yours. Respectively means in the order named: Lee and Dana filed the brief and the log, respectively. Do not use respectfully for the order.
Examples
UseShe answered respectfully.
UseThe red key and the blue key open the gate and the shed, respectively.
AvoidThe red key and the blue key open the gate and the shed, respectfully.