One great thing about the human body is that it is highly capable of adapting to stress. Exercise is a type of stress and your body will adapt to it. Whatever workout program you're doing, at some point, your body will adapt and results will plateau. Luckily, if you've found a workout method that works for you, a basic change, or small addition can fire up results once again.
An easy addition to a workout that can fire up results is a "workout finisher". The great thing about "finishers" is they can be relatively short, but can do a lot to kick start your results. They can focus on a weakness, a sports specific drill, or just a body part you want to add some extra attention to.
One of my favorite finishers is the "Burpee Lunge 101" finisher. It's great for legs, gluteal muscles (often referred to as glutes), and upper body pushing muscles. Your abs will also get in some work.
In this video I go over the finisher. Give it a try.