Downshifting Trouble

Ok so training has been going great, been practicing backing gor the past couple of days and working out minor kinks on my setup. Our 10 speed truck broke down so we switched to annother truck that is an 8 speed. I was doing great shifting, i can float up and down just fine with the 10 speed. We drove the 8 speed today and i can float up but i am having a difficult time downshifting with floating and clutch. Im not bringing it to the proper speed before shifting i believe. With the ten speed all i did was add the numbers to know the gear like i knew i had to be under 35 mph for 8th 25 for 7th 15 6th and so on. Now its quite different lol any tips? Its mainly downshifting in traffic or to a light. Hills i use rpm and when its getting low rpm i shift to keep it high...

Josh, there's already tons of stuff on shifting and clutching here. Put "down shifting" in the search box above. You'll have lots of reading.