Turning the lights back on...

[Skean Dhude]

Only if you are using it. So you could opt out.

Myself I'd guess the first thing I would be looking for is comms. It is probably the easiest to do.
Water next to get agriculture up and provide clean water although this depends on where you are. Dry area or not.
Medical facilities next although this would depend on the number of people and facilities where you are. Making antibiotics would be a major step.