What does he know as of now? I mean, the sky is the limit! If you know how to clicker train / shape behaviors then you can train him to do anything. Turn on or off the TV! Pick up his own toys and put it in a basket.
I put it in my profile, but he knows sit, shake with either paw, lay down, roll over, play dead, roll over, and I am trying to teach him to balance crackers on his nose.
ok,
I've been trying to think of ways to try to combine the different things he knows now into something cool. I think he needs to get better at retrieving first though, because a lot of my ideas include that.
you could teach him to roll himself in a blanket you just need to teach him to pick up and hold the end of a blanket then roll over wile holding the blanket.