When I worked in a parish office, I handled the bulletin and the Facebook page. I liked putting graphics on social media about all kinds of things that had to do with Catholicism…different ways to pray, saint of the day, sacrament info, etc. The Facebook page for Catholic-Link English has a lot of really attractive graphics for social media. They have a Spanish version too.
Otherwise I really prided myself on a clean, organized bulletin. All the same font, unless it was a special event or feast. Consistently putting things like the calendar/Mass intentions/etc. in the same place every week.