Regular mowing, catching of the grass clippings and also rolling will help to maintain the condition of your lawn.
There are people who believe that cutting the lawn at particular phases of the moon can slow it's growth and increase the time between mowing.
There doesn't appear to be any evidence to support this but there is no harm in trying.
If you are interested in experimenting on your own lawn try mowing during the waxing or full moon.
Just don't do it while the neighbors are sleeping:-)
Getting rid of insects in the lawn will help with its condition and this can be achieved with the use of insecticides that are commonly sold through garden stores or better still with the use of natural methods.
Using natural methods is the healthiest solution as it won't affect children and pets and more often than not the natural methods work better for longer than the insecticides.
Without the toxic contents that are used in the commercial insecticides you will be happier to walk on the lawn and know that you won't be putting any of the residue into your system.
Some people still use soap as a natural insecticide in the garden but you need to be careful that you are using the correct soap, as some household soaps can be harmful to plants.
Obviously you won't want to be flooding your lawn with soapy water and in fact this is banned in many areas where soap can cause problems if it enters in to the waterways.
More and more insecticides are also getting banned so it makes sense to look at the natural alternatives that are available.