Personal Injury Protection
This is definitely one coverage you can skimp on. PIP coverage pays for the medical and funeral costs associated with an accident for you and your family — regardless of whose fault it was. But if you already have separate health, life and disability policies, you can probably forgo this one altogether. Check those policies first, but chances are those sort of expenses are already covered.
Uninsured or Underinsured Motorist
This coverage pays for medical and funeral costs for you and your family in the event you get in an accident with either a hit-and-run driver or a driver who doesn't have enough auto insurance. These policies usually cover bike and pedestrian accidents, too. Given the prevalence of uninsured drivers nationally, this coverage is essential. On average, it costs less than $40 a year for $100,000 worth and will make up for anything your medical insurance doesn't cover.
Collision and comprehensive — which can account for 30% to 40% of your total premium — are cash-value coverages. That means if your car is damaged, the most you'll recoup is the Kelley Blue Book value, which declines precipitously as your car ages. Here's a good rule of thumb: If the cost of your collision and comprehensive is more than 10% of your car's Blue Book value, it probably makes sense to drop these coverages and save a tidy sum. With most cars, you should approach this limit as the car turns five years old. Understand, however, that if you eliminate the coverages, you'll have to foot the repair bill if you get in an accident that's your fault, or if the car is totalled or stolen.
Extras
While insurance companies will try their hardest to sell you any number of extras to go along with the essentials, most of them aren't worth it. Consider rental-car reimbursement, which pays a paltry $15 or so a day while your car is in the repair shop after a collision. Not only is the reimbursement small, the odds you'll need it are remote. The chances are at least even that the other guy will be at fault, and his insurance will pay the full cost of this. Another dubious extra is towing coverage. It costs $25 or more per year on a policy, money you'd be better off putting toward an auto-club membership that would be exponentially more useful. One extra that is worthwhile: Full glass coverage. Auto glass is expensive and an errant stone can ruin a $500 windshield in the blink of an eye.

