The trick is in the trimming of your kite BEFORE you head out.
An essential part of the lesson program that is way too often not taught at all

1) Always launch with bar set on full depower.
If you cant steer your kite to 12 in the neutral zone on this setting you can try again with more power on - but it probably means a bigger kite is needed.
2) Park at 12 and walk to your launch point.
3) With bar fully extended trim in until the rear lines are ALMOST tight - very slight bow.
Check by pulling the bar in 2 or 3cms. This should pull full tension into your back lines.
Your kite is now trimmed to todays days conditions.
Releasing the bar will put you back to slack rear lines & any pulling in of the bar will increase the angle of attack.
Remember that without tension in your rear lines steering becomes a problem. Those posters here who are having difficulty controlling the kite after the launch stroke are almost certain to be allowing the kite to depower too much by pushing out on the bar.
Its not called a power sport for nothing.
Power = control. Its your friend - not something to be wary of.