Actual practice is the best answer, as everyone has already said, but to tag in something you can work on outside of real debates -- work on controlling your emotions so they don't interfere with your mind.

She was a Japanese high school student who was kidnapped, raped, tortured, and finally murdered after 40 days by a group of teenage boys who almost all got severely light sentences. The perpetrators were known to have bragged about their crimes and their family members desecrated her grave for ruining their sons' lives.

Ah, gotcha

IF?

Gotcha, yeah it's not very portable. Good luck!

The Essential Ellison 35 year version is reasonably priced and is a fantastic collection of some of his best works. There are also plenty of shorter collections that don't cost as much on Amazon, and I've also had good success finding his works in used bookstores.