Being the other thread is now closed, and I read your reply. I will have to continue here.
"Sitting on the dog" I found on this site. I couldn't find the thread but it also contained a video. The thread it was in was not specific to this topic.
Basically have a chair, have the dog on a leash or lead. Sit on the lead in the chair and let the dog have about a foot of lead. You ignore the dog like they are not there. The video said to start with a minimum of 30 minutes. You do this daily. The dog, if they are hyperactive or just won't settle down when you want to relax, this is suppose to give them the idea that when you sit down, it's relax or rest time.
you can do short downs of up to 2-5 min with puppy
i would say 8-10 weeks on
increase the time up to 30 min
dont make the dog frustrated but let it get a little frustrated then when it calms wait a few more minutes and let it go
i mean with a puppy wait up to 15-30 seconds
do not expect too much too soon but a 4-6 mo old dog should be able to go 10-20 min anyway
if you do this randomly a few times a week it will help the dog learn to settle itself