I visualize Stevies 360 flip at the beginning of his part in the reason.
im not all that convinced foot placement matters a whole lot. when you have something dialed in you can make it happen with your feet just about anywhere on the board. this is why I dont think trick tips are all that helpful, other than focusing on pressure points (tiago is a great example here), because what works for one person won't work for you necessarily.
I dont have frontside flips, yet, but whats helping me is thinking about flicking straight off the nose, instead of off the side. the angle of my foot on the board doesnt matter a whole lot.
its sick when you see someone wind up for a back 360 and theyre facing backwards before they pop, but I personally try to go for the element of surprise where you cant tell what im gonna do until im doing it.