Well, my thoughts are something like this. If the dollar loses all value, during the time it is descending into hell the value of my mortgage will gradually go down. During that time, pay it off. Find a way now to convert to solar electricity. Buy a indirect injection diesel car like an old Mercedes or VW Rabbit, with a manual transmission. The Rabbit is preferable because, although slow, it uses fuel at a very slow rate. Diesel engines can run off of 25 different things, so finding fuel would be easier for a diesel than gas. If you have a gas car, run it off wood using a process called pyrolization. It's too complex to go into right now, but it basically allows you to run a car off of wood or gasoline. I would also have a house on well water. This way you still have a source of drinking water if your solar panels are in place to power the pump. Stockpile Gold and Silver coins. Large denomination gold coins are good, but hard to make change for, so you also want a healthy supply of pre-1965 quarters and dimes-which are 90% silver. Have a laptop computer. If it does not descend too far, the internet will still be around, and you can use it for data at cafe's. Get a geiger counter. A rogue nation might use the opportunity to further destabilize us with a nuclear attack. This is where the diesel car comes in too. Older diesels need no solid state electronics to run and would not be affected by an EMP. (This is why I suggest an old Civil Defense Geiger counter as they use no transistors) The same holds true for points ignition on a gas car, so hold a complete points ignition and ballast resistor just in case. You will need a gun, so I would go for the AK-47. They rarely jam and can work under low maintenance situations, plus they take a common ammo type. They are also easy to repair and make parts for in a low tech situation. I would also live in the country and grow my own food. The suburbs and urban areas will be a bad place to be due to civil unrest and a lack of food and essentials. Too many people will be competing for too few resources and violence will be inevitable.
Have I done all of this? Sadly, no. I really don't have the reserves needed to get all this stuff just yet.