Don't increase your mileage too quickly.
Shin splints are considered an overuse injury because they usually occur when a runner (especially for those who are new to running) increases their mileage or intensity too quickly and does not allow for recovery time. Stick to the 10 percent rule when training – don't increase your mileage or intensity by more than 10 percent each week.
Run on softer surfaces, when possible.
Running on hard surfaces, such as concrete, increases the stress and impact on your muscles, joints and bones. It's important to vary your running surfaces. Try to find grass or dirt trails to run on, especially for your higher mileage runs.
Give yourself enough rest and recovery time.
When you first get started with running, try to avoid running two days in a row, to limit the pounding on your muscles, joints, and bones, and give your body a chance to recover. Even if you're an experienced runner, taking at least one or two days off from running each week reduces your risk of shin splints and other overuse injuries. A rest day can be a complete day off or low-impact cross-training activity, such as swimming or biking.
Get the right running shoes.
Wearing the wrong shoes may also lead to shin splints, so check your shoes to see if you might need more stability or cushioning. Get advice from an expert at a running specialty store to make sure you're wearing the right running shoes for your foot and gait.
Replace your running shoes.
Running in shoes that have lost their cushioning can lead to shin splints. You should replace your running shoes every 300-400 miles.
Also see: Signs You Need New Running Shoes
Do heel raises and toe raises.
Doing simple exercises such as heel raises and toe raises can help strengthen your calf and shin muscles, to help prevent shin pain.