ANSWER - This is one of those things that is a lot easier to do than to explain. Writing down the techniques I use seem to rather over simplify the matter and don't seem to create a very satisfactory how to guide as to how the procedure actually works. But I suspect that is because focusing intention is actually more of an intuitive process than it is a step by step procedure and it is very tricky to put an intuitive reflex into words.
But I'll have a go... The direction of intent can, broadly speaking, be achieved in two separate ways. The first is by projecting the thought and intent from the mind and the second is to use some sort of tangible process to carry your intent forward.
The first is the hardest to get your head around but as it requires no tools it is probably the most commonly used. I always think that where people go wrong when trying to project their intent is that they focus too much on the outcome and don't spend enough time formulating the actual intent in their own mind. The power of your intent is determined by the clarity of the thought in your mind and this is where most of the work takes place. You need to focus your mind on what it is you want to achieve and hold on to that thought, letting it fill your mind and grow in power and strength as you focus your attentions onto it. When the idea is sufficiently powerful you can change the direction of your focus from what you want to achieve to the outcome you expect to result from your spell and then you can direct the energies you have worked on in your mind toward that targeted outcome.
I'll give you an example to make it simpler. My intent may be to get my husband a new job. The first part of the spell (the intent) is me building the energy as I imagine the impact on him, on our home, on his happiness levels... I let these positives grow and grow and then I throw that energy at the tangibles (the how will it happen). I'll direct the energy toward manipulating the individuals who may get him the new job, toward drawing him toward the geography of a particular location of work and I'll visualise him doing the job I want him to do.
So it's a two stage process - building the intention energies and then mentally throwing that energy at the effects you wish your spell to make.
The second method is a lot simpler. You infuse a carrier with your intent. The most common way of doing this is to speak your will into a candle (again making sure to build that focus at the start of the spell) but other methods might involve thread magic - sealing your intent into a string of cotton and letting the wind carry it away or infusing your energies into a pebble and tossing into a river or stream. Sometimes these methods can be a little more user friendly if you are struggling to get your head round actually projecting the mental energies of your thoughts toward your desired outcome
And of course - every witch will probably have a different take on this so the best advice is to experiment with different ways until you find a method that suits you the best.