Always end on positive note.

[Tman41]

When your working with your parrot, you always want to end on a positive note. You are working on a new trick, and your trying to show him what you want, and it just isn't working don't just stop. You want to go back to something he knows, and have him do that a few times then end the session. That way it's on a positive note, and helps keep his confidence up.
Just a thought for the day.