Every martial artist needs to have explosive kicking ability intertwined in their training.  Explosive kicks combine all four of the T.A.P.S. theory.  They are powerful kicks executed extremely fast with precision and technique.  If you cannot combine all four of these principles, you run the risk of losing a fight.  To help you stay successful if you ever encounter a situation like this, the workout you will see here will help make your kicks much more explosive.
15/10/5 Drill
This drill is called the 15/10/5 drill.  For each kicking drill you perform, you will start out by doing 15, then 10, then 5 repetitions.  Once you get to 5, you will start again at 5 going back to 15.
Beginner

• Front Kick – 15 | 10 | 5 |5 | 10 | 15
• Round Kick – 15 | 10 | 5 | 10 | 15
• Side Kick – 15 | 10 | 5 | 10 | 15
• Hook Kick – 15 | 10 | 5 | 10 | 15
• Axe Kick – 15 | 10 | 5 | 10 | 15
• Wheel Kick – 15 | 10 | 5 | 10 | 15

If you feel like you have enough energy, focus on some more advanced kicking drills to develop further.
Benefits
There are many benefits to this drill that will be apparent once you practice this routine for a period of time.  As you start at 15 and work your way down, you are conditioning your legs with proper technique and improving your cardiovascular fitness.  On the way up to 15, however, your legs should be tired and start to feel heavy.  This is where you will have to force your kicks at the same speed and power without losing technique.  Your quads and other muscles will start to feel strained because your legs will feel heavy.  It is a lot like wearing weights around your ankles as you kick. Because you are pushing your legs past their threshold, you are developing the muscles that develop much faster and stronger kicks.
If you have been training a long time, and this drill just does not give you the satisfaction you need, change it up a bit.  Instead of 15 to 5, do 30 to 5.  Make it a goal to start at 100 and drop down to 5.