As a practical thing to do for the election, I signed up to send 200 postcards to encourage people to vote.

Written, addressed, stamped.
Specifically I signed up with Postcards to Swing States. The sent me the postcards, mailing list, messages they’ve tested, and a mailing date. If all goes right everyone on the list will receive 2 or 3 postcards over a few weeks.
As a practical thing, my 200 postcards are a drop in the ocean. But it’s my drop, and I will probably do it again in the future.