Reading Order Guide

I've heard that some people have been interested in a guide to what order they should read these serials, if the intention is to read all of them.  The truth is of course that they can be read in any order; For any which are ongoing, it's perfectly fine to just read them as they update.  However, here are some variations in the experience you may have reading them if you decide to read in a particular order.

Checkboxes before Yokaishiteru: Once Checkboxes is completed, this will be a chronological progression with only about a week between the ending of Checkboxes and the beginning of Yokaishiteru, both occurring in the same location.  Yokaishiteru's first few chapters are also lighter fare, so could be good for recovering.

Checkboxes after Yokaishiteru: Since even as Checkboxes isn't done yet, Yokaishiteru's beginning reveals its ending, reading Yokaishiteru first colors Checkboxes in a different light with the knowledge of where it will eventually lead.

Mahou Shonen Just Say No is a standalone story, without active ties to the others.  It can be read at any point without difficulty.  There are overlapping characters and situations, but as it happens in a different timeline, it's not a big deal.  However, if you either read MSJSN before every other story or read every other story before MSJSN, you'll be able to pick up on the differences between the timelines.

Akuma No Imouto  is more of an ensemble story, with its premise of collecting secrets from various characters, but chronologically occurs in the year 2020, which is further in the future from any of the other stories.  Otherwise, its own plotline doesn't tie in to other plots.

Evil Meet Justice and Bad Dreams both take place back in the 90s, and are two sides of the same coin.  They also take place in different parts of the United States (New Mexico and Washington, Boston and Texas respectively.) and both serve as exposition for the overarching themes of the International Intrigue Agency and The Order in the other stories, as well as telling about their own characters.