The first thing to consider is what type of exercise you want to be doing at home; is it for strength training, cardio or stress relief? Your answer (or answers) will dictate which pieces you ...
You can remain warm and dry and still get in a good at-home cardio workout ... Most of the included exercises use bodyweight, but some require a set of light or medium-weight dumbbells.
Cardio workouts that include bodyweight exercises and basic strength moves are especially handy for home-bound runners because they can be done almost anywhere (like your living room on a snow day) ...