Not so much a technique, but a principle
So, training for a wrestling tournament recently has me thinking about mat domination. I find that in wrestling, and to some extent in judo, it's always an advantage to dominate the center of the mat space in a fight, that said, you can still lose with good "center control," but it's never a bad thing to have. Watching some replays here and there has made me realize how much I use center control in Toribash. Aikido.tbm and greykido.tbm for sure has a large amount advantages that come with center control. This isn't as direct when it comes to ABD, but definitely has a place, it's obvious you want your opponent between you and the closest border of the dojo. I've noticed how much I use center control in Toribash, and maybe you guys can realize how crucial it is in most aikido mods.
Some replays demonstrating good "center control." Notice the position of my tori in relation to the center of the dojo, and how I aim to get my opponent out of the center ASAP.