Its the number on the dice you roll. Mathematical nerds would have you believe in the laws of probability. Equal probability, bell curves, and averages are supposedly how the dice work. Of course, they are all fools. Dice tend to accumulate positive and negative energy.
Positive energy gives good rolls and negative energy gives bad rolls.
Another key to good dice rolls is mental thought. The mind can generate powerful mental waves that can control the roll of the dice. The will of the roller is one of the best techniques for dice rolling. Some suggestions are in conflict with other suggestions. Choose the ones that work best for you and ignore the other ones.