There are some effective rules that involve recognizing some roughly triangular configurations.
All highly similar -- though only the 3-3 Triangle gives you mine locations, all three indicate the same three squares are clear:
These particular shapes are more common than you might think, and give you three clear squares, once you learn to recognise them. The 1-2 Pyramid gives you three clear squares:
The 2-3 Pyramid gives the same three squares, with the bonus that if the middle cleared square is a 1, you can clear the yellow squares as well: