How can I store LEGO bricks to prevent damage?
Plastic Bricks

Fading — Keep bricks away from natural light to avoid colour fading. (Models in Legoland Miniland are subjected to year-round weather. The chemicals in the plastic bricks are broken down by UV light.)
Heat — Keep bricks at room temperature in a dry place (like a cupboard). The melting point of a brick at 105 °C (221 °F) shouldn't be a concern.
Dust — Store bricks in air-tight containers. Dust is notoriously difficult to clean, especially around the studs of a brick. Whilst dust has no serious long-term effects on Lego, it saves a lot of time cleaning the bricks in the future.

Special Parts

Electronics — Always remove batteries from electronics when put into long-term storage. Over time the batteries may corrode, leaving a sticky mess that can be difficult to clean.
Rubber — Technic rubber bands and other pieces made of rubber will degrade over time when exposed to light and oxygen. Keep rubber bands in an airtight bag.
Stickers — How should I store unused stickers?


I'd save these last two points for LEGO merchants or casual online shoppers:

Smoke — Keep bricks away from cigarette smoke. It can be very hard to remove damage from bricks, and may discolour them as well as leaving a faint odour.
Pet Hair — If you plan on selling your LEGO bricks in the future, you may find some buyers have allergies to certain pets.