The phone is definently the smartest recovery tool when your sunk to your diffs.
When that fails it becomes all about either being prepaired or being inventive.
Being prepared ,
Winch- fixes most situations,
Wallaby jack- to raise the vehicle and fill treches with logs etc,
Chainsaw- to cut logs for trenches and blocks to stop jacks sinking ,any one that travels bush trails should have one as if a tree falls while you are prospecting there may not be any way around it to get out.
Shovel- to dig your way out but if you are on your diff its usually to late and if bogged in soup the key will be getting back on top of the crust not digging the crust off.
Bog boards- seen em on 4x4 shows look perfect for getting back ontop with either some jacking or shoveling,
plus about two other ute loads of possible gear , a winch is by far the best insurance just hook to trees at ground level as i roll on the ground laughing when the tree is laying in front of the ute.
Being inventive still depends on some tools the more you have the more options you have.
Basics that should be in every bush vehicle would be
Pliers/wire cutters- wire is usually findable in the bush and has a million uses like lashing a tree rail wider than the vehicle to the wheels by threading the wire through the rims do this front and back, then creep the vehicle up on top of the rails ,fill the trenches in with logs and cut wire hopefuly it doesnt sink again.
D shackles short chains- 100s of uses like threading through rims and around tyres for extra traction
Axe or saw - cut rails etc layin enough small sticks across bad wheel tracks can carry it across
Shifter spanner- its amazing what you might pull off your vehicle or some rusting junker sitting in the bush to be repurposed for your recovery.
Being inventive works some of the time it also makes things worse some of the time and usually causes miner damage like marks on paint etc.
All in all the earlier you react when your vehicle becomes stuck the better your chances every revolution of the wheels is making it harder to get out so before you try to go back and forth reving it get out assess the situation maybe 5 minutes with a shovel or 5 min getting rocks or sticks will save 5 hours later.
In the case of the tonka truck above it looks like it just fell into soup.
Lets say it a days walk to phone service or civilisation its on a track only you know about and no one knows you are there ?.??? What now ? I hope other people add there method aswell. Its either hike out or get inventive.
Mine would be to try the rail method of raising the vehicle back to the surface because if it works it saves hours of jacking with standard jacks .the rope would do cut up to lash some rails if any solid ones could be found. At worst them side boards look tempting to be used as rails or even dug in long ways to get up on top , no doubt it will stuff em but it could still be cheap option , halving the tyre preasure may also aid in recovery to some point.