#14 Worry about covering every subject everyday
Some families like having the same schedule every day, and if that works for you, great. But if trying to squeeze every subject into every day is too much, play around with your schedule and see if something else works better. And if an opportunity comes along to go on a fabulous field trip, or delve deeply into a subject your kids love, take it!
My experience is that my kids often learn in bursts. Generally just a little after I begin to panic, they will amaze me with complete understanding of a concept that apparently needed a little time to gel.