I still think the best chipping/pitching aid is a bucket.

Yes you read that right a bucket. Place the bucket anywhere from a few yards away up to 40 yards (or as long as you can go in the yard without endangering anyone or anything!). The bucket should be angled towards you so the ball can enter the bucket at about a 45- 70 degree angle.

If you spend 20 minutes on chipping into this bucket a day your chipping/pitching will improve leaps and bounds...