How well do you treat candidates? Some suggestions for managers:
Treat candidates as you would customers. That is, with consideration. Don't make them wait; be prepared for interviews and start them on time, and don't use up more of the candidate's time than necessary. Make sure they're comfortable.
Don't complicate their current situations. Respect requests to not contact current employers. When candidates ask if they can meet with you, or turn in paperwork or take tests, after work or on weekends, try to accommodate them.
Share what you know when you know it. Since even unsuccessful candidates may be the people you want to hire next time, or who may refer future good hires to you, give them prompt feedback.