I have never met a hill that I couldn't walk up! that aside, practice and get into the lowest gear possible as soon as possible and then just get the bit in your teeth and decide that the ***** hill is not going to beat you. I have cllilmbed hills with just enough momentum to keep moving without falling over, and I have fallen over, like the little old man on the trike in "Laugh in" (am I dating myself here?), but as the saying goes- no matter how fast or how slow you climb it, the top of the hill will still be there when you get there.

As for downhill, kick over into a harder gear, build speed and at the bottom switch down into a lighter gear, coast up the hill as far as you can until you feel the momentum start to slow and then start pedaling. It's all about the changing gears and the rhtym.

Good luck.