How can I lessen the growth of algae in my pond

How can I lessen the growth of algae in my pond?

Reduce fertilizer use.
Replace turf grass at pond edge with deeper rooted plants that are better at absorbing nutrients.
Turf grass due to its shallow root system is not very good at reducing nutrient run off. On steeper slopes its thick surface growth actually sheds the water, letting it flow over the grasses into the pond instead of letting the runoff enter the soil. I recommend the use of native Illinois plants for this purpose since they are well suited to our soils and would not require chemical fertilization to thrive. If plants that need regular fertilizer and mulching to survive are used then you would be better off leaving it turf grass.
Remove organic debris that falls in the water. Tree limbs, tree leaves, etc.
Bag mower cuttings in vicinity of the water.
If on septic systems, have them periodically inspected.
Discourage geese from entering lawns.