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Training to reach high speeds within relatively short distances can increase your top speed. Sprint drills are an easy way to accomplish this.  Run at top speed for 22-33 yards (20-30 meters). Make sure that your arm action is smooth and relaxed during the exercise. Keep your arms close to your body. Focus on making smooth, even strides. Keep your head relaxed and in a natural position. Slow jog or walk back to your starting point when finished with the sprint. Do 2-4 repetitions of this drill. The ability to accelerate quickly is critical in soccer, and often more important than a high maximum speed. Acceleration drills will make you build up to and come down from high speeds more efficiently. This type of exercise also helps you work high speeds into other routines. To do a simple acceleration drill: Jog for 7 yards (6.4 meters), then accelerate. Begin to decelerate around yard 12 (meter 11). Repeat the sequence, then walk back to your starting point. Training with a speed ladder will increase your speed, lower body agility, balance, and coordination. This horizontal tool requires you to alternate your feet across successive rungs as you run. To improve your speed, train with the ladder while using a stopwatch, and work on improving your best time. Speed ladders are available at many athletic supply stores and online. To use speed effectively on the field, you will have to get used to using bursts of speed interspersed within other movements. To accomplish this, do 30 minutes of interval training. Alternate light jogging (5-10 min) with short bursts of more powerful exercises, such as:  Sprints Running stairs or hills Ladder drills Using a ball in combination with any of the above

Summary:
Do sprint drills to raise your maximum speed. Do acceleration drills. Use a speed ladder. Try interval training.