Get the car serviced. It is better to do it now than to have problems on the trip. Get any major maintenance done a week or two in advance, in case there are any problems with the work.
- Oil change
- Scheduled maintenance
- Fluid levels
- Tires, belts, wiper blades (check and replace if needed)
- Breakfast stuff (Individually wrapped pastries, instant oatmeal, granola, instant coffee, tea bags)
- Snacks (Dried fruits, chocolate covered coffee beans, Indian snack mix)
- Some drinks (Water, juice, soft drinks)
- Other stuff that jumps off the shelf at Trader Joe's
Use up or give away perishable food.
If you have medical needs, make sure you have enough prescription medicine to last during your trip.
Arrange with friends, neighbors, doorman, or security to watch your residence (Water plants; pick-up newspapers, fliers, etc.).
Pay bills and plan for any which might come due during your absence.
Clean up (It would be embarrassing if you die and your survivors find a messy house).