how about a little EMOM?

EMOM stands for "Every Minute on the Minute," and it is a fun way to mix your workouts up a bit. 

The idea is that you begin each exercise at the top of each minute.  When you finish the designated number of reps, you can rest until the next minute begins.

I did a 5 minute EMOM here, but you can repeat it to make a 10, 15, or even 20 minute workout.  This one requires no equipment-- just your body weight.  You can  add some weights if you would like to make it more challenging-- I mention it when I talk about modifications for each exercise.

Don't forget to warm up before and cool down after!