Thread: Discipline: What works, what doesn't

As I write this post I'm sitting in one of two Victorian side chairs I just bought today. My Bengal mix is a scratchaholic but seems to limit her damage to the basement sofa. My MC's sometimes scratch carpet but avoid furniture. I've used water bottles in the past, but for other behaviors like going outside the box, fighting, whining for food, and other nonsense I often use picking up by their scruff and scolding or time outs in a room. I had to break up a nasty fight between Merlin and Sampson again this morning. This time Merlin (MC) had Samps cornered where he could not get away and was really beating on him. I grabbed him by the scruff and put him immediately in time out. So far there's been no other incidents today...
What does everyone else do when their furkids misbehave?