1) Abuse them.
2) On a long car ride—if you’re not insane, this works best with another player—amuse each other by only speaking in sentences that involve two clauses, independent but related, that could conceivably be fused with a semicolon. Try it; this game is harder than, and as personally embarrassing as, it sounds.
3) Eschew the em dash.
4) Missionary style.
5) Use the semicolon to ingratiate yourself with a future employer by inking it onto your forearm, if you happen to work in the media industry. I did not actually get the semicolon tattoo with a job in mind, though my then future (now former) boss has joked that it was the reason she hired me. I actually didn’t get the semicolon with much in mind at all, plus I was sober, so there’s really no good story behind it: a friend of mine was learning to draw tattoos and offered to do simple designs for the cost of materials; I liked semicolons, so I thought I’d ask him to put one on my arm.