Ok - for those of you not sure about how much to sheet in or out...
A few examples to suit various kites....
1. To maximize lift at say 15 knots, start by standing on the beach - and sheet the bar in untill it sits directly overhead at 12oclock - that is the optimum vertical lift angle of your kite.
Take note of the bar position...
This is a good starting point - I personally set my bars to 'just be' fully sheeted in this position without any backstall.
Then go out and experiment, check your bar position during a few jumps to see where you actually have it - it will be different compared to the beach test - when you steer the kite into the jump and swing under it ... the kite continually changes its aerodynamic efficiency or (angle of attack) etc.
If a stronger gust hits - it will automatically induce a little drag or stall which is why I don't set for backstall on the beach at all...
Fine tune the bar in the air by sheeting in or out a little to see what position keeps you in the air the longest... so it will help you understand your kite dynamics better..
2. For roughly every 5knots + or - your kite is going to respond differently and your settings may have to change.
When I'm riding and the wind say increases to 20 knots, I adjust the Depower in - so full power is "just" before the kite backstalls at full speed.
3. The exception being, if you have do not have an explosive big air fast turning jump kite... You may want to have more bacstall in your setting to help it turn better..
Everyone has there style but this puts you in the ball park.
What Dimitri says about the fast slashing 2 & 3 count... cannot be over emphasised, the more aggressive you do it "The bigger you'll go" !!!
Wear a impact vest and helmet untill youve got it down - there's no shame in going huge