1) Very first mod for anyone: Remove dealership logo license plate frame(s)
2) Then remove any dealership stickers or emblems they may have put on your truck. Use a blowdryer to heat it up and carefully peel it off, don't use metal tools like a screwdriver, hands or plastic tools only for scraping it off
3) Remove the exhaust tip. Or add one. Whichever you prefer. Bolt on tips are lame so don't use them. Weld-on tips only or nothing
4) Roof rack bars delete mod. Or install them if you don't have them. Or plasti dip your current ones
5) Check your tire pressure with a quality gauge, and re-torque (with a torque wrench, yes you need one of these in your tool collection) your wheel lugs. Some dealers/shops have a tendency to over inflate tires and over tighten lugs
6) Install or remove running boards. I think its just an easy bolt on situation
7) Not sure how easy this on is but check out the Back up Camera Switch. Lets you view the back up camera whenever you want
8) Should have put this one sooner, but you can customize your startup image. If you have navi you can add a custom image that shows on the screen when you start the car. Stock image is a toyota logo I believe
9) Put together a tool bag for your car. Include stuff like screw drivers, allan keys, knife, duct tape, electrical tape, scissors, gloves, flashlight, pens, sharpie, paper, pliers, wrenches, and a tire gauge (get the analog one with a circular gauge, not the digital kind, not the stick kind either)