What are the best BJJ techniques for self-defense?

Self-defense BJJ differs from sport BJJ in important ways. You need to account for strikes, multiple attackers, and environmental hazards. The closed guard is useful because it controls an attacker and prevents them from striking effectively while you set up a sweep or submission. Mount gives you the dominant position to control and finish. The rear naked choke is the cleanest finishing technique because it incapacitates without causing permanent injury. Takedowns should be used only when necessary because the ground is not safe in a street situation if multiple attackers are present. Standing clinch work and takedown defense help you control the distance and decide whether to engage on the ground. Hip escapes and mount escapes are critical because being pinned on the ground in a real situation is extremely dangerous. Many self-defense scenarios involve grabs, headlocks, and tackles that BJJ directly addresses.