National Readathon Day is almost here! Get ready to post reading selfies all day long, and be sure to follow the hashtag #Readathon2016 to see authors and readers across the country do the same. Watch the video and click the stories below to get up to speed and find out everything you need to know for tomorrow. 1. Add our #Readathon2016 Badge to your Facebook profile picture today! 2. Commit to support early childhood literacy by contributing to our Facebook Donate campaign. 3. Get ready for the weekend with a post from Bustle, and catch up on stories from DBW…