It's good to have a simple thing to do during down time in a game, waiting for other players to do stuff. Some players like to doodle on their character sheet. But you can use the time for something more productive, if you have the inclination. If you're a doodler, take clean sheets of paper and a bunch of art supplies.

Maybe then the slowpoke players will get the hint...

Transcript

Luke: So do I drop my sword?
GM: <roll> Worse, you must have left it on the ship.
Luke: I'll be right back!
GM: While he's away, the clone Mark appears, in a tuxedo and straw hat.
Mark: {singing} Fate is kind. She brings to power lust, the sweet fulfilment of that secret longing.
Chewbacca: That is a terrible, terrible lyric. Here, try this. And let me grab my guitar.
GM: You wrote a song?
Chewbacca: I didn't have much else to do while Chewbacca was waiting on Kashyyyk to be kidnapped.
R2-D2: Wait. You wrote an actual song just now?
Chewbacca: You say that like it's hard or something.
R2-D2: Touché.