Do any of you mummies/daddies ground your kids? And in what kind of ways?

I try not to be too harsh on my kids - I mean, kids are kids. But when they do something majorly wrong or unacceptable then the most I have done is to make them stay in their room for an hour (to think over what they've done). My husband has taken away their iPad and iPhones for a full week as a way of grounding them.