I wrote about the importance of strength training for all yesterday, no matter what your goal is, and here is @daisyberisha knocking out a 5x5 of some front squats. She bases all of her sessions on the fundamental strength movements, does almost no cardio (just the occasional barbell complex), takes care of her diet (mostly nutritious foods), while still being able to enjoy herself on nights out. Her workouts are quick and intense, and she makes sure her form is as close to perfect as possible.
Take her form here for example- elbows up, knees out (not collapsing), stance firm, descent controlled. She makes sure she's training her muscles and the movement, not her ego. She trains safely and focuses on small improvements week to week- little more weight, extra rep or two, or less rest. When she's busy, she comes in at least to maintain, even if she doesn't improve a lift week to week.
This is smart, sustainable training. This is how 95% of people should train. If you want your best body, you have to strength train. You have to be consistent.
If all else fails, ask yourself, "what would Buffy do?"