It's good to have gymnastics instruction from a certified gymnastics instructor!! You can find a gymnastics club near you probably at the gym listings & ratings directory:
http://gymchat.com/listings .
Here's a twisting technique:
http://gymnasticszone.com/ArmWrap.htm
Summary:
First step is setting for the layout to get high enough, so there's enough air time to complete the twisting - setting = get arms to ears on your set before the flip. The twist part: when you're flipping, drop one arm lower and/or sooner to one side - drop left arm = twist to left, drop right arm = twist to the right. To increase speed, instead of keeping your arm straight to the side when you put them down, tuck it in, like the ice skaters. Also head should move in the direction of the twist - twisting left then look to the left, twisting right then look to the right. To stop the twist, open arms - a good way is to open to a 'stick' position - arms up and out diagonally from the shoulders.
You don't want to twist too early:
Dovicka's Fulltwist Tutorial Part 1
[youtube]84viVYgbQzI[/youtube]
Dovicka's Fulltwist Tutorial Part 2
[youtube]tBrEJiWJMZ0[/youtube]
**from a self-taught guy with no gymnastics instruction
An interesting technique from a guy on youtube:
"Izzi's Standing Full Twist Tutorial-READ DISCLAIMER"
[quote]*W A R N I N G* READ BEFORE WATCHING
THIS IS A STANDING FULL TUTORIAL. THIS IS FOR ENTERTAINMENT PURPOSES ONLY. THIS SHOULD ONLY BE USED AS A REFERENCE. DO NOT TRY IF YOU DO NOT HAVE PROPER TRAINING, A GYMNASTICS INSTRUCTOR, AND A PROPER GYMNASTICS GYM. IM NOT HELD RESPONSIBLE FOR ANY INJURIES WHILE ATTEMPTING THIS.[/quote]
[youtube]OhyLKm2ihkw[/youtube]