Press down on the lemons firmly as you roll them on the counter. Cut the lemons in half and squeeze into a measuring cup. Strain to remove the seeds and/or pulp.
In a medium sized pitcher add the lemon juice, water, and agave. Stir well then top with lots of ice.
Enjoy immediately or refrigerate for later. Just be sure to add the ice when you are ready to use so it doesn't melt in the lemonade.
For a sweeter lemonade gradually add more agave tasting as you go. For a more diluted lemonade gradually add more water tasting as you go.
Notes
* Be sure to use light agave nectar. Amber agave has a very intense flavor!