Rob83 said..
So when your riding its best to move the kite up and down 1 to 2 and pull the bar in and out to get extra power is that whats ment by juicing
This is probably a little simplistic. Moving the kite around will build apparent wind to get you up to speed. You can then park the kite once you are planing. Repeat if necessary. Bearing away whilst diving the kite will add speed so you can then reestablish your edge.
Moving the bar in and out is like a shock-absorber on a car. Push out to spill the gusts. Pull in to power up. Set your trim strap so that the kite is at max power when the bar is right in and not oversheeting. Also, push out a little to turn the kite. If it's pulled right in both stearing lines are tight and kite won't respond quickly. It's not uncommon to adjust you trim strap quite often during a session. I know I do as the conditions change.
Don't fly the kite too high. You'll get a better edge when the kite is low. Don't be afraid to fly it 1-2 m off the water sometimes as well. It's fun and helps you fine tune you kite control.
If you watch the experienced riders you'll notice a lot of kite movement. These are not random movements. They are tweeking every turn and trick, sometimes subconciously. Don't look at the kite if you can help it. Feel it so that it just becomes an extension of your arm.