Consider the Purpose
What do you most often do with your truck, or what are you hoping to do with it? If you're often transporting supplies or materials, you may want to protect the bed with a mat or spray liner, while if you're into off-roading or camping, a truck shell or cover may be just what your vehicle needs.
Think of Your Passengers
Some accessories improve the convenience and comfort for passengers riding in your truck. For example, if you're driving your children around, running boards or nerf bars will make it easier for them to get in the cab.
Engine tuners and gauges make the most out of your vehicle's motor, maximizing for efficiency and power. Improving your mileage can save you money at the gas station, making a tuner an upgrade that pays for itself in the long run.
With all the available accessories out there, thinking about who uses your truck and what you use it for can help narrow down your choices. See this site for more suggestions for truck parts in Clairmont Mesa.