[yelojkt]

Sasha you should just go out and drive when you have nowhere to go or no place to be. Focus your attention on how the car feels, sounds and responds to different things that you try in it. In a manual car you have to think about what the car is doing to determine what gear you need to be in. There is nothing wrong with putting the car in nuetral on a down hill but if you are going 70 mph at the end of the hill than you should put the car back into the appropriate gear. In a boxster five speed that would be fifth gear at 70. You also need to rev-match the engine. As you have been rolling along on the downhill in nuetral your cars engine has slowed to idle speed. So if you go from nuetral to 5th gear at 70 when you release the clutch the engine will not be turning at the same speed as the gears in the transmission thus you would get the "pinch" or jerk you are talking about. But if you bring the engine speed up as you let out on the clutch than the transition will be smooth. Practice makes perfect.

Never try to put the car into to low of a gear without rev-matching the engine to the cars speed. doing so is hard on your car and can in some cases cause a spin.