Dry fruits stay fresh longer when they are kept away from heat, moisture, and direct sunlight. An airtight jar in a cool cupboard is enough for everyday use.
After you open a pack, move the nuts or dried fruit into a clean, dry container and close the lid firmly. A clean spoon is better than wet hands, because moisture can spoil the pack.
If you buy a larger quantity, keep what you will use this week in the kitchen and store the rest in a sealed container. This keeps almonds, cashews, raisins, and dates tasting the way they should.