Replying to I need a bit of jumping help

I know the key to a good landing is popping off the lip properly. I try to pop how I think I should and it doesn't really work very well. I come up to the jump center on my skis and then do what I think is popping. It's hard to explain though. Everytime I land forwards from a 3, I land backseat. Not sitting down back seat, just back tips first then the rest of the ski. Because of this I like doing 1's and 5's a lot more now because I don't get shin bang from them. I want to get better at my 3's though. How do I get a solid, center on the skis landing?