Oh, if you are going to do commands you need a 'look at me' command.
Besides that for commands (not fun stuff) always make the animal comly the first time and praise after he/she gets it right, just like verbal for animals.
"Sit" *push but down* "Good Dog" *pat pat*
You should expect your dog to follow your command w/o repeating it.
Otherwise he'll learn that its o.k. to ignore your commands because he gets a second or third chance.