To make learning this trick as painless as possible, you should have a solid foundation of stalls under your belt. After all, it is easier to learn on a small curb than it is a rail or grinding bar. A good way to practice this is to randomly skate up to objects (both high and low) and try to stall on them. As you get more practice, your body begins to learn what it needs to do to jump that high and stall in the proper position. With that knowledge, frontsides are a piece of cake! Find (or get) yourself a low and shallow bar to practice on. Things like the barricades in front of car dealerships, metal bars around walkways, and bike racks are good places to start. Approach the bar slowly, taking care to run perfectly parallel to it, and be slightly to one side. As you near the bar, jump up nice and high and turn 90 degrees while watching your landing spot. Much like a batter in baseball, watching where you will be landing is essential to success. Spread your legs about shoulder width apart, and absorb the impact in your knees. Skate back around and try again..and again.. and again! (Repetition is the key) A couple of key things to remember are your landing, your stance, and your commitment. When you land, you must be sure to land between your tiny middle wheels. Otherwise you will catch on your wheels and you will go flying. (You cant grind with big wheels) Your stance is also very important. Think of yourself as trying to stand on a tightrope- Its hard, but possible. Try and stand erect, with your arms stuck out for balance. When you try to correct a mistake, adjust using your hips and arms, and not your knees. Also be sure not to over correct, as myself and many others tend to do. As for commitment, not enough can be said about it. If you go up to a rail and only give 50%, you WILL fall and hurt. Commit and TRUST YOURSELF. If you think you can do it, you are halfway to doing it. After all, stalls aren't that much different than frontsides. Skate hard, skate safe, and practice a lot!