
1) I have put my hand and gently pushed the bum down and had my other hand under the pups chin and said sit, once the pup sat I praised/treated.
2) I have also held a treat to pups nose and went kinda over the head and said sit, which made the pup sit and reward. (hope that made sense)
I have done both with all my dogs from about 2 months on, and it seems to work everytime,since they now no what sit means now all I do is use one finger and do like a tap motion and say sit and Iam standing away in front,(can't say they do it when out in public unless I only have one, or treats in my hand) all dogs sit and I treat or praise them. I find it works pretty good, my 3 month old pup now does it (as well as following the other 5 dogs must help to learn what I mean).
Hope this made some sense.
ttfn :)