Theory and speedbuilding students : How do you practice older theory material? Help!

I'm falling behind on previous chapters to practice because I am trying to stay current with new chapters I am learnimg. How do I practice older theory material and new theory material on a daily basis? What's your daily practice session look like to practice older material and new material? I'm finding it there is so much material that I don't even know which ones to study or for how long per chapter (I'm self teaching). Please help! Thanks so much!!