It is highly recommended to learn meditation directly under a
teacher's guidance, though there are meditation books out there.
It's also quite important to learn under a highly enlightened
teacher and meditator who can guide you on your practice towards
enlightenment. And you have to discern what books are the right
ones for reading. (There are many non-Buddhist, and unorthodox
Meditations that do not lead to enlightenment)
Concentration on breathing can mean different things. It is how you
practise the Anapanasati (mindfulness of breathing) that determines
what effect it is going to bring.
To develope insight, you must focus on the clarity of the
breathing, and not pay attention to thoughts about the breathing.
In the recent thread,
How to practise Vipassana (Insight Practice) in Daily
Lives?
...Thusness: when u breath, u don't have to care what is the
right way of breathing, whether u breath hard or soft, smooth or
fine...just experience as much clarity as u can...just that
experience...regardless of what it is like.
Thusness: same for all other experiences.
Ck: wot abt sound? hows it?
Thusness: when u hear, just the sound...the totality of the sound.
There is no how but just to do away with all abitary thoughts. Hear
the sound as clear as u can be.
Ck: then wot abt thots?
Ck: thots r v sticky 
Thusness: thoughts seldom arise if the practice is correct. If it
arises, then not to chase after its meaning. Not to answer urself
what it means, not to dwell in 'what'...then u will resort to just
the moment of awareness....
Just FEEL the Breath... the air.. the coolness or warmness...
the hardness or softness... the liquidity or cohesion... the
movement or vibration... But do not discriminate, do not label
'this is warm', 'this is hot'. Just be thoughtlessly (no labeling,
mental perception or discrimination) aware of the moment to moment
sensations to the minutest detail until you can see the arising and
passing of each moment. It has to be as natural as possible, and do
not exert effort to control the breathing, which is still using
thoughts. This is not yoga or qi gong, you do not do breath
control. Let it happen on its own... only the Clarity is important,
this is to touch our luminous nature.
Awareness is spontaneous and uncaused, it is timelessly
ever-present and effortlessly manifesting, it is merely overlooked
by our separative, dualistic thinking. Therefore your meditation
should be as natural and effortless (means no one 'doing'
awareness, just awareness) as possible.
This open being is not something to be practiced methodically.
Toni points out that it takes no effort to hear the sounds in the
room; it's all here. There's no "me" (and no problem) until thought
comes in and says: "Am I doing it right? Is this 'awareness?' Am I
enlightened?";; Suddenly the spaciousness is gonethe mind is
occupied with a story and the emotions it generates.
~ Joan Tollifson
----------------
There is no need for awareness to turn anywhere. It's here!
Everything is here in awareness! When there is a waking up from
fantasy, there is no one who dos it. Awareness and the sound of a
plane are here with no one in the middle trying to "do" them or
bring them together. They are here together! The only thing that
keeps things (and people) apart is the "me"-circuit with its
separative thinking. When that is quiet, divisions do not
exist.
-----------------
Enlightenment, True Nature, True Self, Wholeness, the Unconditioned
Absolute - whatever words have been given to what is without words,
unthinkable, unknowable, ungraspable - is not the effect of a
cause. It is luminously present and timeless, overlooked by the
roving intellect that is trying to grasp it, and obscured by the
bodymind's constantly shifting moods, desires, and fears.
Moment-to-moment meditation is clearly coming upon this roving and
shifting, resisting and fearing mind and the urge to do something
about it!... Meditation that is free and effortless, without goal,
without expectation, is an expression of Pure Being that has
nowhere to go, nothing to get.
~ Toni Packer
There are a few things you need to take note of, including
postures, mudras, and other various sitting advices.