For your first venture out choose a suitable spot, a good open space with no hidden depressions in the ground or rocky outcrops.
Prepare your gear and make sure that everything is in perfect working order.
Wear the right clothes. If you are flying facing the sun a pair of sunglasses is a must. If you are on a field, wearing trousers could prevent nasty grass burns. When learning a helmet is also a good idea.
Launch your kite and take it overhead into the neutral position.
Fly your kite a bit from side to side get a feel for the pull and even let it pull you a little.
When flying a kite with a buggy keep in mind that you will fly the kite on one side of you while you steer the buggy across the face of the wind (like sailing or wind surfing).
Now get into your buggy and slowly put your kite into the edge of the power zone. Be prepared for your buggy to slip a little while you and your kite settle.
Keep an eye out for any unforeseen obstacles.
As you gain confidence you can bring the kite lower and more into the power zone, this will cause you to gain speed so be prepared!
As you gain speed you will find that you and the back of the buggy will start to be pulled sideways. You need to counter-steer the buggy to avoid veering off track.
Be careful when you cross from a dry patch to a wet/slippery patch as this will cause the buggy to slip sideways.
Skidding out is a useful way to slow down and can be used as a kind of brake.
Another way to stop is to do a wide skid. This is done by doing a quick, left-right maneuver with your foot pegs or right-left depending on which direction you are going. Then counter steer to avoid going into a spin and take your kite overhead into the neutral zone.
One can simply take the kite overhead into the neutral zone but be careful doing this. If it means going through the power zone your kite will power up and pluck you out of the buggy. The best method would be to get the kite to the extreme edge of the wind and edge it upward from this position.
In order to turn you will have to learn to gybe! To do this, do a wide skid as described above and bring your kite up. As you slow down, turn as sharply as possible as you lower your kite back into the power. The main key to doing this successfully is to synchronise the turn of the buggy and the kite motion.