Come in just like you would on a scarecrow, maybe even sit a little lower.. Weight your back foot so that you can wait on it and pop at the very top of the wake.. I used to continue my front foot away from the boat at the top of the wake to initiate, but it will put way too much tension on your arm and it is unnecessary.... Just get really good pop and make sure you have continuous line tension all the way into the air, just lean into it a little bit.
Here is a video of my second day doing the trick... now i do them much better... Im thinking more about doing a really big ts indy that is grabbed first, then poked out... thats the mentality lately at least..
Hope this helps
http://www.youtube.com/watch?v=qLz17MWzSPs