DS had such long and intense tantrums as a toddler, I began to look forward to them. I figured as long as he was screeming, i knew exactly where he was and what he was doing, so I'd make myself a cup of tea and relax or I'd use it as a chance to get some work done! Perhaps is sounds callous, but the truth was there was nothing I could do except let it run its course and then give him a big hug and snuggle when he felt better. I think his longest one I timed at 50 minutes, but 30 was pretty common, certainly enough time to get some things done around the house without him interupting me!