Most useful MODS?

There's basically two kinds of mods, ones that improve or change the appearance of our trucks and ones that make our trucks more useful.
You don't have to list all of your mods, especially ones that are just for appearance, but list some of your most useful mods.

Mine are:
Navigation lockout bypass
40" Cree light bar and fog light mod. (I do a lot of night driving)
Duratracs for off-road, deep snow. (I do more off-road driving then Hwy.)
Backup LEDs
Airbags

 

Subjective question.

 

console safe by lockerdown
drivers side grab handle
integrated factory electric brake controller
46 gal fuel tank by transfer flow
2"+ shackles and shims by coach builder
interior cab chrome control with brushed steel plastic wrap
rear seat fold down mod for access to space behind the rear seat on the Double Cab
stubby antenna
seat covers and Husky floor mats

I do not do much for anybody elses ideas of good looks. Why would I care what anybody else thinks?
I do not want any extra tint on the windows. I like to see clearly when I am out scouting for game and sometimes it is too cold to roll the windows down.
also, the shell could be considered a "mod" but I do not want to do without it.
soon(I hope) to add winch bumper w/winch and rock sliders.

that's just me. You should do what works for you.

 

-AMP Power Step running boards
-Firestone Airbags w/on-board compressor and auto leveling sensor.
-Murano Bi-xenon retrofit
-Rigid D2 H/L foglight upgrades
-Baja Designs LED bunny-burners
-Remote tailgate release
-LED backup lights.
-Swingbox bed storage
-Toyota cargo divider
-Upgrade to 2012+ Power-folding tow mirrors.