Depending on your line length, there are a just couple of other ways to launch - aside from good old "off the wall", which some people prefer.
For a regular throw, hold the nose of the kite in your power hand (right vs left handed)... Push tail roughly straight out away from you, releasing the nose... If the angle of the toss is right, and you step back fairly quickly, the kite should float to the end of the lines, then "load up" just above the ground, facing up.
The dart (my favorite), is best broken down:
1. Hold your kite by the nose, so you are looking at the front (nose up) and the lines are clear (hanging from kite to hand, no snags).
2. Pull the nose towards you (tail away, belly down), and then continue that rotation until the nose is pointed away (on back, nose away).
3 Your lines should look like they are going over the front of the kite, around the back, and under the trailing edge before they reach your hands.
4. Now, holding the tail with your power hand, gripping with 2 or 3 fingers, like a dart, or paper airplane.
(inactive hand can be used to support the far end of the kite from underneath)
5. Again, imagine you're holding a dart or paper airplane with your power hand and let it fly... Not a push, a flick of the wrist and a little elbow.
If done correctly, the kite will sail out nose away, on it's back... Once it reaches the end of the lines, draw both hands back evenly and close together near the chest.
Once the kite hits the end of the lines and you draw back, it should appear to unroll 1/2 way and begin flying straight up or a little to the side.
(you might have to move back a little faster, or adjust the launch technique if the kite isn't reaching the end of the lines)
(also, experiment with multiple roll ups - I've done up to seven indoors)
I hope that made some sense.