Keep Nails Dry - Wear open shoes/sandals as much as possible.
Treat Fungus Early - Get treatment and stick to it. The quicker you treat fungus the easier it will be.
Use Moisture Absorbing Socks - Moist damp areas are the breeding grounds for fungus.
Clean your feet with anti-microbial soap. This will aid you in treating and preventing further fungus.
Wear clean socks and shoes. Fresh socks will prevent a fungus build up and aid in preventing and treating fungus.
Talk to a Podiatrist.