A person shared that their friend used to do this with his car at red lights. He would carefully steer out of the way of nothing, and the rest of the cars behind him would do the same.
When you shake someone's hand, move yours left to right as they do the traditional up and down. Someone else mentioned offering a “dead fish hand,” where you provide your hand but make no effort to move it.
Put a tiny piece of masking tape over your friend or co-worker's mouse laser. More likely than not, they'll troubleshoot everything on their computer except for looking at the mouse.
When conversing during a meal, only ask questions to people actively chewing. Every waiter in the world seems to use that trick when asking me if everything is okay.