Real Self Defense is not just about technique. Yes, there is the holy grail of techniques that you will soon learn that are simple and effective by design. But that's only a small part of the equation. Unfortunately that's the primary concern of all martial artists and this is why many a black belt has gotten a good ol' ass wooping at the hands of some skel.

As you will learn, the technique is the EASY part. The other key element is how you train.

Training makes you tough. It's as simple as that. The harder you train, the more confidence you have and the tougher you are.

Get out of the bar, a drunken brawl, though dangerous, is not a primary concern. Your main concern should be the predator that earns his 'living' taking people like you off the count. This is the worst possible scenario. If you train for situations like that, a drunk, steroid induced blow hard is not a problem.

Another myth made by 99.999% of all self defense experts is the Self Defense Specific Scenario. In other words, if my assailant does this than I do that, if he does that, I do this. Though comforting, it leaves the situations in the thousands. And who in the world can possibly prepare for each individual situation.

The common denominator of ALL Self Defense Situations is this:
Distance and Position: where you are and where your assailant is.
Every environment: the street, parking lot, snow, woods, jungle, etc.
You have to assume your assailant is armed, he has friends and he has intent.
You will be taken off guard and your adrenaline will only allow you to perform gross motor skills.
And you may be old or injured.

In order for a self defense system to be effective: a minimum of techniques must fit into all of the above. Train those techniques with intent and conviction, keep yourself in shape and you're good to go.