Boomers do like cars. Boomers do like gadgets.
Therefore, the many add-on devices and gizmos, which are manufactured, for use in cars do have appeal, for the motoring boomer.
There are accessories, which are providing, you, music more to your liking.
A GPS does display, via moving map, the route, which is leading, toward your chosen destination.
A heated mug will keep coffee hot as long as the car is running. There are other useful functions and nice effects, which are preseinting, as add-on accessories are being added.
Many car accessories are low enough in price so that they may be well worth installing. This article concentrates on the lower priced accessories. Most are under $50.

Here's the list with some information and comments about each:

12 volt heated mug - A mug with a plug for getting power from the cigarette lighter socket. It keeps a liquid such as coffee hot for as long as the vehicle is running. Some models have a thermostat to set the temperature.

Cooler/warmer- These give the choice of keeping food or beverage hot or cold. Some are sized to hold a can of soda or a mug of coffee, larger units might hold a six pack or more.

12 volt coolers - These range in size to hold 2 soda cans up to full size refrigerators for recreational vehicles.

Multipurpose lights - Can be incandescent, flourescent or led. They might plug into the cigarette lighter socket, might be wired directly into the car's power circuits, or be battery operated and portable. If used while the vehicle is not running, a consideration may be that led models will drain the battery the least (but in general produce less light).<

Compass - Some are magnetic, mechanical; some are battery powered with digital displays, can be lighted to read at night, and/or have additional features such as time, date, and/or temperature.

Flashlight - Dozens of types available including windups that don't require batteries, solar rechargeables, flourescent tube (bulbs last much longer), and led models that will run many hours on one set of batteries.

4 point safety harness - Has four anchor points with a restraint for each shoulder. These are more likely to get you through a crash with less injury than if you had been using a standard belt (across one shoulder and across the lap). Many of these models are made to attach to a roll bar, so make sure the one you are getting is appropriate for your vehicle.

Power inverter - Plugs into the cigarette lighter sockect, clips to battery, or wire it in. The vehicle's 12 volts dc is changed to 120 volts ac to power things like laptop computers, coffee makers, cell phones, camcorder battery chargers and other small appliances. Don't go bigger than 400 watts unless you want to go directly to the battery with heavy wire. Even then, high power devices will drain your battery quickly and could fry the alternator if the engine is running.

Other accessories that can be used to enhance your car include seat covers, floor mats, steering wheel covers, sun shades, head rest covers, litter bags, can and cup holders, inside/outside thermometer, gps/map device, extra loud or novelty sound horns.

Items to keep in your car for repair, emergency, safety, miscellaneous- Jack, lug wrench, trouble light, flares, jumper cables, maps, cell phone and phone numbers, coolant for radiator, drinking water, long storage food, empty container for gasoline, various hand tools, gloves, coat, hat, blanket, rain poncho, and a first aid kit.