Yeah, stop doing the same sequence of actions (down after sit, etc). Does he know how to come when he's called? Does he know how to heel? How about a standing stay? (Very useful for drying paws, putting on coats, etc.) Mix your training up: sit, come, stand, down, heel, sit, heel with frequent changes of direction, changes in speed, etc. If you don't know how to teach him to heel or stand, go to a good obedience class (look for one that uses positive training, rather than jerking the dog around or going to e-collars right off the bat). Teach him to 'watch me' (you say 'watch me' and he looks at your face/eyes). Work on self-control (aka, doggie zen: to get the cookie, you must leave the cookie); you can google 'watch me' and 'doggie zen' on the internet.
Does he know any tricks? I taught my parents' english cocker to jump through my arms or over an arm, to roll over, to play dead when I made a finger gun and said, 'bang' (she'd also play dead for a 'silencer'), taught her to crawl and walk backwards. Riley will shake hands with a bit of a twist, he'll slap my left hand, my right hand (changing paws) then I'll turn my back, put a hand out behind, say, 'gimme some skin', and he'll slap that one. He'll also walk backwards up the stairs, and sit 'pretty'.
Bottom line, keep him busy, keep him guessing, keep it short, keep it fun.