Rake out the moss thoroughly
Improve lawn drainage
Reduce shade by pruning trees or shrubs
Aerate compacted soil
Test soil pH
Apply lime if soil is too acidic
Fertilize the lawn properly
Overseed thin or bare areas
Mow grass at the correct height
Water deeply but less often
Remove thatch buildup
Use a moss control product if needed
Fix low spots where water collects
Keep the lawn healthy and dense