This "waiting period" is a good time to let schools know of any changes to your application, finish up campus visits, and conduct additional research on each school you applied to. But most importantly, this is the best time to relax! Please read the below article which is just as applicable today as it was back then.
https://www.usnews.com/education/articles/2007/10/31/what-to-do-while-waiting-for-admission-letters
