Most of this stuff stays in the truck unless I need something around the house. When offroading a cooler also gets strapped down in back. From nose to tail.

Calmini bumper with Warn XD900i winch. Shackles in the tow points.
Garmin eTrex Vista mounted on the steering column
Radio shack CB mounted in the dash

Leather work gloves in the drivers side door pocket.

In the center console:
Sony DSC-F505V digital camera
Cell phone charger
Radio Shack FRS

Toolbag in backseat drivers side floorboard clipped to leg of front seat containing:
Wrench and sockets for every bolt on the truck
Various screwdrivers
A couple crescent wrenches
Channel lock pliers
Needle nose pliers
Allen head key set
Torx head bits and sockets
Drill bits
Snap-on Screw extractor kit $70 but worth every penny
Wire stripper
Wire crimp tool
Assortment of electrical connectors and fuses
Multimeter
Xacto knife and spare blades
Front hub locknut socket

Winch remote stuffed in the back pocket on the passenger seat.

In the floor behind the passenger seat:
Lapop with 2002 ESM loaded on it
Inverter plugged into back seat power point

Stuffed between the backseat and the Big Box:
spare torsion bars
10'x10' tarp

In the Raingler interior net:
Rainsuit
Fleece
Windbreaker
A couple ball caps
Sunscreen
Beach towel (never go anywhere without a towel)
30' tow strap
10' tree saver
Powertank hose and tire chuck
Roll of toilet paper in a dry bag
Roll of paper towels on a bungee between 2 of the roof hooks

Big Box in the cargo area with:
1/2" impact wrench
Socket set for impact wrench
1/2" torque wrench
Makita drill and charger
Makita flashlight uses same battery as drill
Spool of wire
Bearing packer with grease
Miscellaneous shackles
Snatch block
Tire repair kit
Duct Tape and electrical tape
Hand ax
Bow saw
Miscellaneous bungee cords

No point in taking tools unless you have the parts. Almost all of this stuff I've broken on the trail and most of it I changed on the trail at least once. Spares in the big box:
spare upper ball joints for Calmini arms
spare lower control arms (for ball joints)
spare half-shaft
spare Warn hubs
spare hub
spare front grease seals
spare tie-rod assembly
spare belts and hoses (haven't needed yet)
spare alternator
spare motor mount
spare tie-rod end for Calmini centerlink (haven't needed yet)

In the rear pockets just inside the hatch:
A couple trash bags
Spare bolts for warn hubs
A couple ratcheting tie downs

Bolted to the rear cargo tie downs:
Hi-lift
Shovel strapped to hi-lift

Bolted through the floor:
10lb Powertank
Halon fire extinguisher bolted to Powertank bracket

One thing to keep in mind, is that in a rollover anything not tied down can become a projectile. I don't know how many people I've seen that just pile stuff in and it goes flying around the truck offroad. The only stuff I have that isn't real secure is the stuff in the Raingler net. Stuff there tends to slide out, but it's all soft stuff and won't hurt when it hits me in the back of the head.