Hoard things that people will need, you can use it to trade for food and other stuff. There are lists on the internet of must have items for survival then there are lists of tradeable items such as toilet paper, soap, cigarettes, etc.. things that will not be available but will be needed by people.

Its probably a good idea to get some rations that will last 20 years or so and store that too just in case.

Also transportation is important, since gasoline will be scarce then a bicycle is the best thing to have. Make sure you have extra inner tubes and a pump. Things can go bad out there after a nuclear war.