Register with Revenue for customs by getting an Economic Operators Registration Identification (EORI) number.
Have the facility to make customs declarations or have arrangements in place for a customs agent to do so.
Be familiar with and talk to the other key players in the supply chain.
Know the origin and Commodity Code of the goods or products.
Talk to the person who transports the goods to make sure they have the new information they need.
Consider alternative routes to EU markets.