Store more
Why: stop capping your resources (and limit pillaging).
What helps directly
Upgrades
Increase your storage capacity
Raise the Warehouse: it lifts the maximum amount of each resource you can keep.
WhereStronghold › Infrastructure
Related bonuses (good to know)
Tactic
Protect your resources from pillaging
Unopened loot can't be stolen: keep it closed and open it just before spending.
WhereInventory
Other needs · Get more resources