To get him in his car seat, we used to pretend we are fire fighters going to put out a fire. Now he's pretty good at getting in his seat.
We have races a lot. I'll say, "I'm going to get to the kitchen, FIRST", or "go pee", or whatever it is.
He loves construction vehicles, so we pretend to be cranes, dump trucks, ect. when cleaning up. I often say, "I need a crane to come pick up these cranes, is there a crane any where?"
When I need him to leave the bedroom because I am putting baby to sleep I ask him to play hide and go seek and tell him to go hide in his bedroom.
When I need to cut his finger nails, I talk the clippers and pretend they are hungry and they tell him what his nails taste like.
I used to play this dragon game to get him to go pee. We pretend that dragons live in bathrooms and we have to try to sneak into the bathroom and go pee without waking them up. I'll say, 'Oh, I think there's a dragon in the bathroom. Let's sneak in there and pee but we can't wake him up". But of course, we always wake them up. So I'll growl and say, "who's in my bathroom?" in a growly voice. He would talk back to the dragons and have a conversation. This was a huge hit. But now he always goes pee when I ask him to.
We make up songs a lot. Especially when we brush teeth. I will make up songs as I brush but they always involve telling him the foods he ate that day that I am brushing away.