Let's see here....
Swish pattern would be, probably the easier approach, unless you have a coach to guide you through.
You can see swish pattern combined with anchoring in this vid by Derren Brown:
http://www.youtube.com/watch?v=Yr-QtNE9k84
I'll explain the type of Swish I have from Bandler, it may be a little different from what some others may teach.
but anyway
The way I use Swish patterns is as follows:
1. Elicit the desired state, note the submodalities of this image. Let's focus on visual here, and if you aren't strong visually, imagine how it would be if you could see it.
(In your situation you picture a situation where you felt really comfortable and confident. Then you note the submodalities of this experience
You'll find a list of submodalities here:
http://en.wikipedia.org/wiki/Submodalities (Couldn't get direct link to work, but this should be easy enough) : Note as many as you can. )
2. Then you take the situation in which you would like this emotional state to occur more frequently.
Notice the difference in submodalities, meaning. If the image of you in a confident state is 3D, and this one also is, you don't note this... there's no point.
Take notes of how this experience is different.
The difference here is what is important to change.
You'll find the list on the Wiki-link.
3. Now, this is why it's called Swish, because that's the sound you are to imagine it make, and that is how quick the change is:
You take the situation where you used to have a problem before, and go to the moment before you start to feel less confident. e.g. right before you go up to a girl and say "I'm going to fuck your brains out tonight. Ditch these other girls, bring that hot, blond friend of yours and come with me to my place"
Ok, picture right before you decide doing something that may not have made you feel comfortable before; and then you do the swish:
and you're going to do it several times.
Every submodality, as quickly as you may snap your fingers... Swish.
from the undesired to the desired position of confidence, calm, cool, collected self that is your best.
Swish, again.
and you're going to do this over and over again, you may want to think up similar situations to change, and string them all along the life-line, so they go Swish, Swish, Swish, Swish....
and here's a little bonus.
If you feel like improving the feeling of confidence you can do this exercise:
Sit down, take a few deep breaths, and go into that feeling of confidence again.
Notice where this feeling starts, where it is located.
Now, what you are going to notice, is that in order for this emotion to sustain, it has to move. And it tends to end up in the area where it started, as to keep traveling the same path. Taking the same trip over and over.
So, every emotion tends to travel through your body in a circle.
What you are going to try then is allowing the feeling to move faster...
Picture the feeling, feel the feeling, as it goes faster and faster.
You may be surprised to find that it grows stronger, and stronger.
You can anchor this..
And if you want to reinforce the anchor, you repeat the exercise at a later moment, or straight away.
You can also try different ways of reinforcing the emotion, such as letting it grow bigger, or turning the brightness and saturation of it up, generally just changing the submodalities. If it doesn't do anything or it affects you negatively, transform it back to how it was before, so that you don't fuck up yourself.. hehe.
for those who may not know what submodalities is: It's the characteristics of the experience; such as big vs small, black and white vs coloured. and so on.
If you feel the need for me to clarify, please say so.
I'm afraid I'm not all that good at filtering away the unnecessary information.
Hope you are able to do this stuff
Btw. to test that it has had the effect it should, try thinking about being in the situation which would have made you feel less confident before.