Jab Defense 1

This first defense is done by doing what, i call a side-lean which is done by leaning your upper-body to either side using speed.  Whatever side you lean towards that hand should come to the other side of your jaw or to the front to protect.  To avoid the punch perfectly practice the move while the attackers arm is still bent when he throws.  I believe it's best to lean towards the shoulder of the punch so you won't get hit by the other hand so go to the outside which is the side of the shoulder.

One thing you can do is combine this defense with a sidestep to further get to the outside just to be safe. Both moves must be done at the same time to save time.

Jab
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Hook Punch Defense 2

This defense works by bringing your forearm horizontal to the side of your face covering your cheek but not touching your head because power may still come through your arm.

Hook
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The Street-Fighting Stance

The first thing is turn your head left or right, bring rear fist up to the side of your jaw with other in front of your jaw and coming from the side of your shoulder.  The fist in front should be moving back and forward a little to be ready to strike.  Bring head down a little so it can be covered by your fist.

The next thing is your legs, they should be slightly bent with one foot in front of the other.  The front foot should be somewhere under your front arm and other somewhere under your rear.  The rear foot is pointing sideways and front is forward, both of them hopping a little off the floor one foot at a time so that you won't be flat footed and you'll be ready to move on them.

This is the position you want to be in when you practice striking or footwork.  This form is the truth, it does not come from any style and any or all techniques can work easily from there.  

Hook Punch Defense 1

This first defense is done by ducking down in a circular form which will cause the punch to fly over your upper back.  You perform this by first bringing the head down at the same time as your torso and making a circular movement and coming back to where you started.  When you duck down under the hook you can possibly catch a knee-strike so when you duck cover your face with your forearms.  It's also good to use the defense while stepping back because the attacker may throw more punches.

Hook
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Bear-hug Defense 3

The first defense comes when your grabbed from the back you want to shoot your elbow straight back and let your waist move at the same time for full power.  When grabbed from the side deliver a hard sideways elbow which should strike your attacker in the stomach.  Your forearm should come past your stomach to perform this elbow.

All elbow-strikes must come immediately when arms come around you so you won't get trapped. 

Bear-hug Defense 2

The first defense is a simple back-kick to the shin or knee, once the grab happens from the back you lift a foot up and give a hard kick.  The second is a stomp-kick to the lowest part of the shin right over the opening of the shoe. A stomp-kick to the toe of the shoe can possibly work but it's risky the shoe may have enough cushion to absorb the blow.

When grabbed from the side you can deliver a stomp or front-stomp-kick to the leg in front of you hitting the knee or shin. If your grabbed from the front immediately use the stomp to the shin, knee to the thigh or hard knee to the groin.  If your picked up you can still try the stomp or knee strike.  Try to put up to 2 defenses in a combination and practice against anyone of any size.

Bear-hug Defense 1

The first defense is the most simple which is using the headbutt when your grabbed from the front, side or the back and your arms are trapped.  A front grab can be defended by using a quick jabbing headbutt to the face smashing the nose.

When the grab comes from the side you can do a simple sideways headbutt giving a snapping or a throwing strike hitting the attacker with the top or side of the head.  A back grab can be stopped by a backwards headbutt and make sure people you know well don't attack you like this.