Check second-hand books and clothing for silverfish when brought into the house.
Store books and papers in light airy conditions.
Store food in airtight containers.
Keep the kitchen clean and free of food scraps.
Fix leaky pipes or taps that create dampness problems (for booklice).
Provide adequate ventilation of sub-floor and storage areas (for booklice).
Install reverse-cycle airconditioning to reduce air humidity, making the environment unsuitable for booklice.