It's about time I started this. Feel free to pitch in with any good replays.

I'd like to classify sacrifice throws into 3 categories:

Front sacrifice throws: Start with uke facing you, then drop your COG below uke without turning your hips away. Lift and throw straight back or to either side.
EX: Yoko Otoshi

TIPS
*Look for times when uke is pushing into you, which makes it easier to drop under their weight and throw them over.

Back sacrifice throws: From behind uke, drop your COG with your hips facing uke. Execute a throw to your side or straight back.
EX: Tani Otoshi

TIPS
*The best time to throw is when uke has his back turned and his balance is weak.*

Twist-in sacrifice throws Start facing uke, but as you drop your COG twist your hips away from him in a downward spiral. Throw over your head.
EX: Peak Throw

TIPS
*I usually do it when uke has one foot on the floor and the other in the air, this makes it easier to rotate them around my body as they can't resist my pull with both of their feet.*


General Concepts

Many sacrifice throws that I do are leg assisted, as you can see in the Yoko Otoshi and Tani Otoshi replays. An added leg sweep or trip can go a long way to insure your opponent can't recover from your throw, but may leave your balance weak and liable to fall over.

A common theme of sacrifice throws in Toribash is to get your COG as low as possible, in a squatting stance or so sort of cobra stance. You can not throw a sacrifice if your opponent has a lower COG than you, so you need to drop in below theirs or raise it above yours before a throw of this type can be successful.

I'll add more to this as the study progresses.