The game rewards discipline more than luck. Strong players protect space first, then convert that space into double-trigger turns where line clears and color pops happen together.
The tray gives you all the information you need for the current turn. Do not place the first piece just because it fits. Compare all three shapes and decide which placement opens the best chain for the next two.
This single habit usually improves consistency faster than any other tip.
Read one section, play one run, then come back. That loop is the fastest way to internalize better placement habits.