There are 4 elements tea doesn't like. They are light, air, moisture, and heat. So it is best to put tea in an airtight canister or resealable foil bags and store them in a dry and cool cabinet.

 

Tea Brewing Guides
What is Green Tea
What is Black Tea
What is White Tea
What is Oolong Tea
What is Tea Plant
About Tea Processing
Grading of Tea Leaves