I’ve gone to extremes before when dealing with certain issues with my kids.  I’d remove ALL candy from the house.   When we mess up, it does affect other people around us.  Therefore, other people in the house will be sad because there is no candy around and maybe your child who is taking the candy will feel consequences of how their mistake hurts other people.  However, usually frequent stealing is a symptom of a deeper issue.  Call your pediatrician or the school guidance counselor for advice.

Lying was a problem for one of our 3 children.  Thats a hard thing to balance.  When they were little, if they told me the truth, I promised I would not punish them.  It was hard, but I wanted to reinforce how important telling the truth was.  Plus, their lying was minimal because they were so little.  When they got bigger, I knew how to spot the lying easier, thus giving them a consequence immediately.  I have always tried to not "get angry" at my kids for their mistakes.  I would just give them a consistent consequence.  If you get angry, then the issue becomes "your anger" and not the actual discipline problem.

However, the last time my 13yr old lied was when she was about 9 yrs old.  It was something silly, but I knew she lied.  There was a small hole in her new jeans and she said it was already there, but I knew she had cut it herself with scissors at school.  It was Halloween night, therefore, her consequence was that she could not go trick or treating.  It was a perfect opportunity to drive the point home!!

Good Luck!