Inspect the starting train
Identify the main weapon and the available upgrade controls. Observe a short stretch of automatic firing before changing anything.
Compare one improvement
Read the cost and effect of a power or speed upgrade. Change one category, then watch the next section of the run.
Review your equipment
When another gun or carriage becomes available, check how it fits the train. Keep merging and equipping distinct in your mind.
Choose a side mode deliberately
Read the rules of a challenge, defence run or mine before entering. Different modes can ask for different priorities.