this is my first year running doing lawn care/landscaping and i am off to a great start. as i am planning on sending my first monthly bill out to all my customers i was thinking of ways to get some feedback. i plan on sending a write up with a self addressed stamped envelope with the bill included. i also wanted to include a blank index card...i will ask my customers to leave any comments,concerns, requests, or specific instructions on the card and send it back to me with the bill. is this a good idea? would there be a better way to get customer feedback throughout the season? thanks!!