I sort of speed shift, but also reduce the throttle to match where I think it should be after the engine slows when shifted into high, sometimes I retard timing a little.
I live in a pretty hilly area of Ohio, so I am on my brakes quite a bit. Everyone will say drive it like you have no brakes, thats hard to do going down a steep incline. Many will tell you to go down the hill in the same gear you would use to go up it. I usually slow as much as I can at the top then use my brake intermitantly, hold for just a second or so and let off, just like you are pumping the brakes on a modern car. Also on really long hills I will alternate brake and reverse pedal, pumping one then the other. Dont forget to throttle down all the way, and retard the timing all the way.
Biggest thing to remember is those bands do not like slipping so reduce that as much as you can.