Alright, you've aired down, the tires won't grab, and you are officially stuck. This is where the ActionTrax become your best friend. Simply get them out and use the sawtooth ends by moving the ActionTrax side to side and cuting a small slot right under the slipping tires and insert the ActionTrax as far underneath the tire tread as far as you can so that the ActionTrax can make contact with as many tire tread lugs as possbile. If you only have two ActionTrax, put them on the drive tires (front or back) if you have four ActionTrax, put one under each wheel.
Now put the car in low gear (forwards or backwards direction is not important) and SLOWLY begin to pull out. You can also try rocking pack and forth here if the ActionTrax do not immediately grab and pull under the tires.
Most of the time you will engage the ActionTrax and pull out, and keep going to solid ground then go back and recover your gear.
If this does not directly happen, remove the ActionTrax and reposition them to the other side of the tires or other wheels and keep trying, maybe in the other direction. Also check and make sure you can see underneath the entire vehicle at least a glimmer of clearance. If the vehicle is high centered and there is no weight on the tires recovery boards will not help traction.
MAKE SURE YOUR TIRES ARE AIRED DOWN
For long silt beds or mud bogs, it's best to have your co-driver help out by grabbing the boards as you cross over and throwing them back in front of the slowly moving vehicle to "leap frog" it through extremely deep sections. This is an experienced only maneuver only meant to be used in life or death situations and utmost care must be given to the the lives lives of the users.