Hello
I'm delighted to have cracked this problem recently (my dog is two).
I've basically done it by not engaging with him and talking to him as much. A friend (who has really well behaved dogs) advised me to look above his head not at him, and just simply don't fuss him up too much. I didn't realise but I was always talking to him and fussing him and so he was constantly excited and primed to jump up.
Now, he keeps his paws on the ground at all times unless I ask for a paw, and also I have found that it has become normal to him to keep his paws on the ground so I now don't have to blank him as much (which I found v hard to do).
I hope that makes sense but I honestly thought I would never ever get to this stage with my dog and he's an absolute joy to have around now - I'm so delighted about it as jumping up was by far my biggest problem. All of my visitors were getting paw marks on their clothes and once or twice he knocked a friends little girl over. I was mortified. Also, whenever I went outside to do anything he would run alngside me just constantly jumping up at me and so I was forever having to get changed as everything I wore got covered in mud - he doesn't do any of that now, he's ace!
Hope you succeed - training is bloomin hard sometimes! It all sounds great in thory I find!
Karen