Ollie problems - If you are having problems with your ollies into the slides, then go practice your ollies separately for a while. You need to have them dialed in and solid. If the problem is that you can't ollie high enough to get onto the object you are trying to slide, then get your ollies higher. If you are having a hard time actually ollying over to the object, then get closer to it!
Board sticking - If you find your board sticking during your slides, that could be that the rail or curb needs to be waxed more, or it could be that you are leaning forwards too much. Make sure that your shoulders are over your board, and that your shoulders are square.
Board slipping out in front - This comes from leaning back too much, which is often because you aren't committing to the trick. Again, stay balanced and keep yourself over your board. Commit to the trick.
Landing shock - Make sure that you bend your knees deeply as you land, and try to have your feet above your trucks. Also, don't lean back on the landing, but keep the same balance as before, with your shoulders over the board.
You might run into several other problems - most of them should be able to be fixed with practice. That's the key to most skateboarding - practice! Stay with it, relax, and have fun. If you have questions, you can e-mail me, or stop by the Skateboard Forum and post your questions there. Enjoy!
