If you must criticize something, offer alternatives or solutions. You have to keep track of your own stuff. If you lose something, it's not the end of the world. You can have a lot of fun in two weeks without your TV, computer and video games. It's OK to miss the people you love when you are away from them.
Group singing is one of life's great joys.
No one likes a chronic complainer. Laughter is contagious. So are Chicken Pox. People will talk if you wear the same shirt three days in a row. If you break the rules, you have to face the consequences.