
Ditto,ditto,to what every one else has said, you could also add,patting his bum when hes straight,saying "good straight" (or whatever you are going to use) then titbit, i do this on all the sits(using different words,straight close &sit for the different positions) so that the dog is sure what its beeing rewarded for, also once you are sure the dog knows what is reqiured only reward the best efforts,i will often say,"thats no good" walk off a few steps & ask again! almost always get more of a effort then!
sometimes whilst the dog is coming i will show the titbit & say whats this,to increase the attitude!!
titbit thrown through your legs will speed it all up!