You can pad your chances on tubed tires by maintaining proper inflation pressures and by using thicker, more durable inner tubes. (The original-equipment tubes are typically thin and cheap.) During replacement, very carefully inspect the rim for burrs or other debris that could puncture the tube, and make sure the rim strip is in good condition. Finally, understand that tubes are not lifetime purchases. They wear out from friction inside the tire—exacerbated by low inflation pressures—and should be replaced with the tires.