Adding a balance board can really bring your workout to the next level. It can turn any workout into a full-body workout, and really make you conscious on your form. I got this balance board from Aldi for $9, and it is a good substitute for the pricey Bosu. Of course these workouts can be done without a balancing board as well.
I also have been really into intervals lately. I got this free app that lets me know when to work and when to rest, even if I do not have the app opened on my phone.
This high-intensity workout is only 30-minutes and will really work your entire body in a short amount of time.
Squat and Press
Dips with alternating extended leg
30-second of each exercise with 10-seconds of rest in-between
Repeat 5 times