Unless more than 3 BLASTOFF letters are lit, starting 13-Ball Blastoff should be an immediate priority.
Voltage scoring can be huge if you shoot for the shots that aren't flashing.
If the rocket lock (for countdown) is a safe shot, Multiball all day is a repeatable and useful strategy.
The Apollo 13 modes can all be useful - Undervolt, CO2, and Rocket 2 Ball are modes to note.