Welcome to Bullet Journaling: Part 4 – Themes where we will discuss what a theme is, if it’s necessary, and what types you can use, if you so choose. I have to say creating a theme for the month is one of my favorite things to do in my bullet journal. Now, choosing one, that's the hard part. Sometimes I get inspiration from the web and sometimes I get it from my family. Once I choose my theme, the fun part begins and the creative juices flow.