In a small bowl, combine the warm water, yeast, and sugar. Stir gently and let it sit for 5-10 minutes until foamy.
In a large bowl, whisk together the flour and salt. Make a well in the center.
Pour the activated yeast mixture and olive oil into the well. Gradually mix the flour into the wet ingredients until a shaggy dough forms.
Turn the dough out onto a lightly floured surface. Knead for 8-10 minutes until smooth and elastic. The dough should spring back when gently poked.
Lightly grease a clean bowl with olive oil. Place the dough in the bowl and turn to coat. Cover the bowl with plastic wrap or a damp kitchen towel.
Let the dough rise in a warm place for 1-1.5 hours, or until doubled in size.
Punch down the dough gently to release air. Divide the dough into 2-4 equal portions, depending on how many pizzas you want to make. Shape each portion into a ball.
At this point, you can use the dough immediately or wrap it tightly in plastic wrap and refrigerate for up to 3 days for a slower, more flavorful rise.
Notes
This dough can also be frozen. After the second rise, wrap individual portions tightly in plastic wrap and then in foil. Thaw overnight in the refrigerator before using.