Non-overstacking construction

Overstacking can be very dangerous against an agressive opponent. If a player is not able to get down to the garbage efficiently, he'll be overwhelmed by garbage.

Fundamental

In this situation, a player overstacks and takes longer to get down to the garbage.

Drop T above clogged rectum

Drop J

Drop L for triple

Naive gravity

With the same sequence of pieces, a player can opt to switch the position of the T and the J, resulting in a clean opening for the garbage.

Towering

When facing an ever changing system of garbage, often, a player has to make the field uneven in height to avoid overstacking.

Be wary when towering because it's not always productive. If a player is not careful, he may end up severely decreasing his options in tetromino placement.