Block wheels.
Temp. fuel tank with known fuel.
Verify coolant.
Bring a good battery!
Drain off some oil & verify condition.
Pour in 1 qt oil (you did remove 1 qt?) as fast as possible to lube the valve train.
Look in the filter intake hose & housing for nests.
Look at the turbo for leaking oil on the 'clear' 1/2" line if on the car.
Keep a 10 or 5 lb. CO2 fire ext. handy incase it runs away.
Unplug the engine shut off line & attach a longer line so you can make a good vacuum to shut off engine.
Dream of long, winding, summer roads.