Bicycling

Early this year I was getting a lot of flats. I realized I was being lazy and just feel the tire and saying "good enough". If you ride with too little pressure in your tires, and especially if you are carrying some extra weight (like me), you will get more flats.

I went to putting the pump (with gauge) on the tires every time and found that I had been riding with up to 30% less pressure than recommended. No flats since. Added benefit is less rolling resistance on properly inflated tires.