I'm just starting on these (again) too - I had them down pat in less than an hour all four ways on my old skates, but when i changed boots and blades I completely lost them and it's taken me a while to get them back, so I can share in your pain!
*Definitely bend the knees and twist hard (my coach tells me to reach my free arm/shoulder across my spine),
*Pull your toes up so you're not tempted to crunch down and "grab" the front of the skate which will throw you up onto the picks,
*Make sure you're looking where you want to be going and keep the head still when you turn,
*Make sure that your free leg is far enough across the skating leg that your balance is over your skating leg - if you free leg isn't crossed enough, it can throw off your balance a lot, making the turn harder.
Also, don't force the turn - when you get your body in the proper position, the turn will just happen (not what you want to hear, I know, but it's true!) and it will be a lot smoother. Good luck!!