Conveniently, he's very self-motivated, and happily assigns himself "jobs" that he meticulously completes. He's quite handy to have around.
He washes the windows.
He puts things away where he believes they belong, which is usually under cushions. Lollipops, alphabet magnets, socks, crumpled tissues -- really just about everything belongs under cushions.
He drags all of our shoes into a pile in the middle of the floor.
And he sweeps!