Hi Julie,
sit - easy
Get a nice tasty treat (chicken was a sure fire thing with Millie). Get him to stand infront of you and make sure he knows you have the treat.
hold the treat just in front of and above him - move the treat backwards over the top of his head and say "sit" at the same time. because of the way dogs are made (bones and muscles wise) it should cause him to sit down in order to keep looking at the treat.
the moment his bum touches the floor say "yes" or "good boy" and then give him the treat. yes is quite good because its short and it bridges the gap between the behaviour you are trying to re-inforce and the treat he is getting - puppies have short attention spans
as for the puppy pressies, hmm the best thing is to try and watch him when he goes out - when he is in the area you want him to "perform" in plenty of gentle praise and encourage using whatever word you have picked for this delicate task (I use "be clean" - and when Millie performs its "yes clean girl"
) - hopefully by encouraging him in the right place it should become more "natural" (?) for him to "go" there. If you spo him going where he shouldn't, hmm, perhaps you could say "no" and move him (if you can!!) to where you want him to go and encourage him to finish off there.
What does anyone else think of stopping unwanted puppy pressies? - it never bothered me much as long as it wasn't in the house, which it never was! aren't I lucky?
I hope all of that made sense!!