A collie must be kept occupied or it will go self-employed. Indoor kennels are great to give the dog a safe den. Leave it something it can chew and remove the toy when the dog has something else to do. Their toys are your toys. Retain at the end of the game.
Collies like to be part of the team and crave companionship of humans.
Don't let the dog follow you from room to room, it should spend some time in it's bed alone when you are in. Is often the cause. Shadow chasing is common in collies. Distract, remove source of light rays if possible and offer an alternative - stuff a kong, activity ball or buster cube. Collies are problem-solving dogs, give them problems to deal with other than fetching the washing off the line.