Chewing is a natural part of a puppy's development as they begin to explore their surroundings. Punish only if caught in the act otherwise this is pointless. Ignore any mess and clear up and remove your puppy from the situation until calm. Redirect your puppy's natural desire into appropriate chewing such as food balls or toys and praise when you see your puppy using these toys. Do not give articles of clothing etc to your puppy to chew as this may confuse it.
If you think your dog's destructiveness is a way of seeking attention then be aware that pets soon learn that they will be rewarded with owners undivided attention when they chew something. You must make sure that you give your dog attention even when it is being good and quiet so that it doesn’t resort to attention seeking behaviour.
Ignore any attention seeking chewing and redirect your dog towards appropriate chewing behaviour and praise any positive behaviour.