The modern automobile is light years away from a simple means of transportation. Today's cars and trucks serve as mass transit systems for carpooling entire departments, recreational centers for road-weary children and portable offices for mobile executives. These changing times have brought about the demand for more gadgets and gizmos to ensure a comfortable and productive trip; from coffee cup warmers and shiatsu seat covers to video game portals and DVD players.

GPS, or Global Positioning System units, are among the most impressive examples of modern mobile gadgetry. With a GPS system on board, you can view local maps and receive accurate directions from virtually any point on the road. These are considered essential equipment for fast-moving professionals needing to navigate urban city streets and travelers exploring the less-beaten paths.

Since cars and trucks have taken the leap from luxury to necessity for many occupations or hobbyists, manufacturers have worked hard to meet the growing demand by offering a selection of accessories suited to car owners of all budgets. The market has been flooded with accessories and it's hard to know what's best, or even what's necessary.

Here are some tips about what to look for, and what to avoid.

Research Your Needs

Research is the key to making any successful purchase. First, find out what you need, and then go shopping for the best price. The Internet is a great research tool, with instant access to countless online articles, user forums and product comparisons. You can also purchase virtually every type of car accessory online. Bidding on Internet auctions is a great way to find quality products at low prices. You can often save money shopping online because Internet marketers have lower overhead. With no retail rental fees and fewer expenses, these sellers can offer lower prices.

Shop Around

Once you know exactly what you need or want, it certainly does pay to shop around. Because of the huge demand for quality automotive accessories, there is also an ever-growing market. Check prices at several outlets, and include smaller stores, and don't be afraid to haggle for the best deal.

Ask Other Owners and Friends

Some retailers simply want the biggest possible profit, and may try to overwhelm you with their vast knowledge and brand name repertoire, only to sell you something you really don't need. Arm yourself with information before you visit the store, and don't fall for the occasional pushy sales tactics. Ask other car owners about the car accessories they've purchased, or read about them online and in industry magazines. Shop around in advance to compare prices. A little comparative information today can save you a lot of money down the road.

Buy Only What You Need

Trying to force buyers to take additional accessories is one of the oldest sales and marketing tricks in the book. It's like being pressured to buy a belt when you pick up a new pair of pants. The same holds true in the car accessories market. Just because a retailer tells you that you really need a neon green GPS cover, it's not necessarily true. Ask a friend or trusted mechanic who is familiar with car accessories and get a reliable opinion on what you should -- and shouldn't -- buy.

Satisfaction Guaranteed

Before you make any purchase, you should always be aware of the basic warranty details. Get the details of the retailer's return or replacement policy and know your rights in the event that the accessory malfunctions, fails to meet your expectations or simply doesn't fit your car.

Take a Good Look

You should have the opportunity to inspect the product before agreeing to purchase it. Of course, this is not an option with Internet purchases, so make sure you're dealing with a reputable online dealer. Many retail stores ask that you sign a receipt stating that the product is in good condition upon receipt, and doing so may mean waiving your rights to return the product if it is indeed damaged.

Auto Recyclers

Look for the phrase "Original Equipment Manufactured" or "OEM" on the package. This is usually an indication that the automotive accessory is first quality, and you will be protected by the product warranty.

Car accessories not only make driving more convenient, they can also impact your safety while on the road. Being prudent in your choice of what to buy and where to shop can ultimately save your life, so don't make price your first priority. Safety concerns should always come first, so don't compromise quality just to get a good deal.

Finally, remember to have fun. If shopping for driving accessories is causing a big headache, maybe it is not worth it. You don't have to accessorize your vehicle; do it because it's fun. After all, that's what driving is all about.