If you spend a long time in a dry environment such as an air-conditioned room, increase the humidity in the room with a humidifier. Wear glasses or goggles to reduce tear evaporation in windy environments or when working at height.
If you need to use eye drops for long periods of time, try to use preservative-free drops. When you need to look at a fluorescent screen for long periods of time, take care to rest your eyes every 20 minutes.