Don't use leather belts, or old shoes as toys. Don't use leather gloves to wrestle with. Don't give them raw hide chews strips.
A dog can't tell the difference between leather he can play with , and leather he can't.
Same goes for toys that imitate household items if you buy them rubber toys that look like everyday items, they think anything that looks like it is a toy.
Buy toys that they can play with, like tennis balls, or Kong Balls. Play with them with the toys, but when you are done, put the toys away. Don't let them chew on them unsupervised.
If you want to give them chews, give them Nylabones. Don't give them raw bones they splinter. You can give them sterilized or boiled bones, they turn to dust, and won't splinter, but don't let them chew them extensively the boiled bones are abrasive to their teeth, too much and it cam prematurely wear their teeth.
And crating is the best way to go. The crate should only be big enough for the dog to stand up in, and turn around. A dog will not potty where it sleeps, unless it is sick, so this helps them learn to hold their bladders.
Don't put food or water, or TOYS in the crate with them. Just a blanket that they can roll into a nest. To save money when buying a crate for a dog, buy one big enough for when the dog is full grown, but make partitions inside to limit the space until they grow into it.
Once they are full grown, and house trained they will still use the crate, if you leave it up, and leave the door open. It becomes a safe haven for them, and they will use it.