Your best form of maintenance (other than a clean-out) is to avoid putting unnecessary or potentially damaging items into your septic system. Things like feminine products, harsh chemicals, coffee grounds or hair, baby wipes or other paper products (besides toilet paper), trash, etc. should not be put into your septic system. You should also avoid planting bushes, shrubs or trees around your tank or drainfield. The roots can damage the tank or lateral lines, preventing drainage.