I second this. Something as basic as the simple and sinister program is all you need. Or HIIT-ish calisthenics if you don't have kettlebells.

I know that weights are better than cardio, but cardio has major benefits for me that I can't ignore. Stress melts off, and I feel much more clear minded + focused with regular cardio. It also seems to keep my metabolism really high. I'm in my late 30s and eat like a teenager (in quantity of food) while staying lean with decent muscle mass.

Agree with you both. I have 3 kettlebells (1, 1.5 and 2 poods) and a yoga mat right outside my back door and it eliminates all my excuses. Even on low motivation mornings I can still bang out 40 swings and some snatches. And it's the perfect thing before coffee/work.