4. Secure supply routes for Afghanistan. By air lift.
Then let NATO-ISAF supply fully 100 percent of its cargo by air by increasing by 5-fold the airport infrastructure and capacity of Afghanistan, building perhaps one or two more big hub airports around the country or a few more long runways and additional cargo handling facilities at existing airports like Bagram or Kandahar - to accept the incoming international flights, such as Hercules C-130s, then from those large hub airports transfer the cargo into smaller planes to fly from new short runways at those few hub airports on to dozens of new smaller airports all around Afghanistan.
To pay for this, money can be reallocated to airport construction by rationalising some of the 200 most expensive and remote forward operating bases and combat outposts. Close those which cost more than they are worth.
Retreat to the really important bases, build airfields for them and build secure supply route defences to and from them and that's a very strong defensive position from which to launch offensive operations against the enemy.
No longer will the legitimate military and civilian traffic require the permission of warlords to travel along Afghanistan's highways.
Securing an air base. Example - Camp Bastion / Camp Leatherneck

Bastion Airport (NATO Channel on YouTube)

Well here's another reason for Bastion to exist - to become a logistics hub for operations across Afghanistan, well beyond Helmand province.
With strategic airlift capacity, think strategically. A few more runways like the new longer runway at Bastion and Afghanistan's airfield infrastructure would be sufficient for all of NATO-ISAF force supplies to reach Afghanistan by air - removing dependence and vulnerability on Pakistan's land routes and eliminating the extortion and corruption along the Afghanistan ground supply chain, as detailed in Warlord, Inc..
After supplies are landed at the few huge hub airports - Bagram, Kandahar and Bastion - cargo could be transferred into smaller airplanes using adjacent smaller runways for connecting flights out to smaller airfields associated with NATO-ISAF forward operating bases.
Whether by luck or by design Bastion is well chosen in being far from a population centre which makes it politically feasible to impose a rigorous security exclusion zone on the ground for many miles around the airport.
Controlling the ground far around a military airport is very necessary to defend the incoming aircraft against missile attack by ensuring no enemy can get close enough to launch a missile anywhere near below where the planes descend to land.
Landing at night is not a sufficient defence. Aircraft engines and their exhaust jets are very hot and infra-red shines just as brightly at night for missiles to lock on to.
We cannot assume that the Taliban will be unable to source the most advanced ground-to-air missiles. We should assume they will source such missiles and take the necessary security precautions.
So at Bastion NATO-ISAF must control the ground in a vast security perimeter out to the horizon and beyond which means closing the nearby road to Afghan traffic and providing an alternative circuitous route for civilian traffic.
I need hardly mention the military, economic and political disaster of allowing the enemy to bring down one of our big aircraft. So this must not be allowed to happen. Therefore a very wide secure ground exclusion zone around Bastion should be imposed.
In addition, I need hardly remind people of Al Qaeda's willingness to use aircraft themselves as weapons and therefore airport air defences need to be operational and alert at all times, not just when scheduled aircraft are landing.
The progress at Bastion is very promising for the whole Afghanistan mission. It shows the way ahead.
We can contemplate one day removing the constraints limiting NATO-ISAF supplies reaching Afghanistan by air. From a limit of about 20 percent now, I foresee a 100 percent supply-into-Afghanistan-by-air strategy as both feasible and desirable.